Issues

How To Prove Your EITC and Dependent Claims to the IRS

The IRS disallowed your EITC or a dependent. Here's exactly what proof wins it back—and how the Tax Court path works if it doesn't.

The IRS sent you a letter. It says your Earned Income Tax Credit is denied, your child is not your dependent, and the refund you were counting on is gone. Maybe it took the Child Tax Credit too. Maybe it changed your filing status from Head of Household to Single and now you owe instead of getting money back. One disallowed child can knock out four things at once.

This is not a niche problem. It is one of the most common disputes facing low-income taxpayers, and one of the most winnable—if you understand what the IRS is actually asking for. The credit was disallowed because you did not prove eligibility, not because you are ineligible. The fix is proof: the right documents, for the right year, from the right people.

This article explains the rules you have to satisfy, the exact evidence the IRS demands, why the burden is on you, and how the path runs from the disallowance letter to a Notice of Deficiency to US Tax Court—almost always as a small case—with audit reconsideration as the fallback if the deadline passes.

What Got Disallowed and Why

When the IRS challenges a child-related claim, it rarely challenges just one credit. The same child usually anchors several tax benefits, and they tend to fall together:

The EITC (Earned Income Tax Credit)—a refundable credit for working people, worth up to several thousand dollars depending on the number of qualifying children.
The Child Tax Credit (CTC) and the refundable Additional Child Tax Credit (ACTC)—a per-child credit for a qualifying child under age 17.
The Credit for Other Dependents (ODC)—a $500 nonrefundable credit for a dependent who is not a CTC-eligible child.
Head of Household filing status—a lower tax rate and higher standard deduction that depends on having a qualifying person in your home.

Disallow the dependency claim and the IRS can disallow all four. That is why a single residency or relationship proof package—done right—can restore the whole stack at once. It is also why the deficiency can look frighteningly large for what started as one disputed child.

Why These Credits Are the Most-Audited

The EITC has a persistently high improper-payment rate—federal estimates have put roughly a quarter of EITC dollars in the improper-payment category in recent years—and the Office of Management and Budget treats it as a high-risk program. The practical consequence for you: EITC returns are audited far out of proportion to income.

The Government Accountability Office, in GAO-22-104960, found that in 2017 taxpayers claiming the EITC were audited at roughly twice the rate of taxpayers earning between $200,000 and $500,000. Only households over $1 million were examined at meaningfully higher rates. The IRS's own rationale, per GAO: EITC returns have high error rates, the audits are cheap to run by mail, and they yield a high recommended tax change per audit hour.

The National Taxpayer Advocate has repeatedly flagged EITC and dependent disputes as among the most common and consequential problems facing low-income taxpayers—surfacing year after year in the Advocate's Most Serious Problems and legislative recommendations.

How the Audit Reaches You

EITC and dependency disputes almost never involve an agent at your door. They run by mail as a correspondence examination—a desk audit conducted entirely through letters:

Letter 566 (the office or correspondence examination contact letter, in various suffixes like 566-CG or 566-B) opens the audit of your EITC, dependents, or filing status.
CP75 (and its cousins CP75A and CP75D) tells you the IRS is auditing the return and holding your refund until you verify the credits. The notice points you to the IRS's documentation checklists and warns that without proof, "we will disallow the audited items and send you an examination report showing the proposed changes." See Understanding Your CP75 Notice and our guide to common IRS notices and letters.
If you do not respond, or the IRS rejects what you send, it issues a Statutory Notice of Deficiency (Letter 3219, 3219-N, or CP3219A)—the 90-day letter.

That first letter carries its own deadline—and it is much shorter than the 90 days you may have heard about. The CP75 or Letter 566 tells you how long you have to send your documents, typically about 30 days from the date printed on the notice. The exact date is on the letter. Responding within that window is how you keep the dispute cheap and out of court. If you send the proof and the IRS accepts it, it releases the held refund and restores the credits—often without the case ever becoming a deficiency. Many of these disputes are resolved at the correspondence-audit stage and never reach court at all, so treat the first letter as the most important one.

You do not have to do this alone, and the help is free: most readers of this article qualify for a Low-Income Taxpayer Clinic, which handles exactly these audits—reach one the day you get the letter, not after a Notice of Deficiency. See also How To Respond to an IRS Audit, and if you received a CP2000 notice instead, that is a related but distinct process.

The EITC Rules You Have To Satisfy

The EITC lives in IRC Section 32. To win it back you have to show you meet every structural requirement. These rules are stable; only the dollar thresholds change each year.

Earned income. EITC requires earned income—wages, salary, tips, other employee compensation, and net self-employment earnings. Pension and annuity income, inmate work pay, and amounts received for subsidized work under welfare programs do not count. Combat pay can be elected in. Earned income is figured without regard to community property rules.

The investment-income limit (Section 32(i)). If your "disqualified income"—taxable and tax-exempt interest, dividends, net rent and royalty income, capital gain net income, and net passive income—exceeds a ceiling, the credit is denied entirely, no matter how little it is. The American Rescue Plan permanently raised that ceiling—to a $10,000 base—and indexed it for inflation thereafter. For tax year 2025 the inflation-adjusted limit is $11,950. Verify the current-year figure on the IRS EITC tables page; it changes annually.

A valid SSN, issued in time. You, your spouse if filing jointly, and every qualifying child must each have a Social Security number "issued to an individual by the Social Security Administration" on or before the due date of the return. An ITIN does not qualify. An SSN issued after the return due date does not qualify. An SSN stamped "not valid for employment" that was issued solely for a federally funded benefit does not qualify. This is a frequent silent killer—the family is otherwise eligible but a child's SSN came through a week too late.

Filing status. Married taxpayers generally must file a joint return to claim the EITC. There is a narrow exception added for tax years after 2020: a married person filing separately is not treated as married for EITC purposes if a qualifying child lived with them for more than half the year and either they did not live with their spouse during the last six months of the year, or a separation instrument is in place and they were not in the same household at year-end. In plain terms: a separated parent who lives apart and has the child can now claim the EITC even while still legally married and filing separately.

The 0/1/2/3+ structure. The credit amount steps up with the number of qualifying children. Workers with no qualifying child can still get a small EITC, but only if they lived in the US more than half the year, are not someone else's qualifying child or dependent, and are at least 25 but under 65 at year-end. For tax year 2025 the maximum credit ranges from $649 (no children) to $8,046 (three or more children), with income limits that vary by filing status and number of children. Confirm the current-year amounts on the IRS tables page rather than relying on a figure that may be a year stale.

Who Counts as Your Child: The Qualifying-Child Tests

EITC, the CTC, and the dependency claim all turn on whether the child is your qualifying child under IRC Section 152(c). There are five tests, and you must meet all of them:

Relationship. The child must be your son, daughter, or a descendant of one (a grandchild), or your brother, sister, stepbrother, or stepsister, or a descendant of one (a niece or nephew). Adopted children and eligible foster children placed by an agency or court count.
Age. The child must be younger than you (or your spouse if filing jointly) and either under 19 at year-end, or under 24 and a full-time student. A child who is permanently and totally disabled meets the age test at any age.
Residency. The child must have lived with you for more than half the year. This is the single most contested element in EITC audits—and the hardest to prove with paper.
Support. The child must not have provided more than half of their own support for the year.
Joint return. The child must not have filed a joint return with a spouse (except solely to claim a refund).

When Two People Claim the Same Child

The most common real-world fight is two people each claiming the same child—separated parents, or a parent and a grandparent. The IRS rejects the second e-filed return or audits both. Section 152(c)(4) breaks the tie:

If more than one person can claim the child, a parent wins over a non-parent.
If both claimants are parents who do not file jointly together, the child belongs to the parent the child lived with longer during the year. If the child lived with both equally, the parent with the higher adjusted gross income (AGI) wins.
If no parent claims the child, a non-parent can only claim the child if their AGI is higher than the highest AGI of any of the child's parents.

A custody decree's "right of first refusal" or who pays support does not control this. Physical residency—the number of nights the child actually slept in your home—controls. That is what you have to be able to prove.

If you are the one who loses the tiebreaker—the parent with fewer nights, or a grandparent when a parent also claims—you cannot win that child, and continuing to contest it only adds time and penalties. The cleaner path is to concede that child and, if you already filed claiming them, file an amended return for that year.

The Older Child or Relative: Qualifying Relative

If a person is not a qualifying child—an older child, a parent you support, an unrelated household member—they may still be a qualifying relative under Section 152(d). Two tests matter most:

Gross income. The person's gross income for the year must be below the annual "gross income test" amount the IRS publishes in Publication 501. Use the current-year figure from Pub 501.
Support. You must have provided more than half of the person's total support for the year.

A qualifying relative can support a dependency claim, the $500 Credit for Other Dependents, and Head of Household status—but not the EITC. The EITC requires a qualifying child, never a qualifying relative.

The Child Tax Credit and the Age-17 Trap

IRC Section 24 defines the CTC's qualifying child by reference to the same Section 152(c) tests as the EITC, with one critical difference: for the CTC the child must be under age 17 at year-end, not under 19 (or 24 if a student). A 17-year-old can be a qualifying child for the EITC and the dependency claim but is too old for the CTC. The IRS's own dependent checklist states this explicitly. The CTC also requires the child to have an SSN issued before the return due date; the $500 Credit for Other Dependents can use an ITIN.

Divorced or Separated Parents: Form 8332 and the Rule Everyone Gets Wrong

This is the heart of the most common dependency dispute. IRC Section 152(e) is the special rule for parents who are divorced, legally separated, under a written separation agreement, or living apart for the last six months of the year, where the parents together provide over half the child's support and the child is in one or both parents' custody for more than half the year.

The default: the child is the qualifying child of the custodial parent—the parent the child lived with for the greater number of nights during the year. A tie is broken by higher AGI.

The release: the noncustodial parent can claim the child only if the custodial parent signs a written declaration releasing the claim, and the noncustodial parent attaches that declaration to their return for every year claimed. Form 8332 is that declaration. Part I releases the current year; Part II releases future years; Part III revokes a prior release. A revocation only takes effect the tax year after the custodial parent gives the other parent a copy, so keep proof of delivery. A post-2008 divorce decree cannot substitute for Form 8332—the form (or an equivalent standalone statement) is required.

Here is the rule that surprises almost everyone. Form 8332 transfers only the dependency claim, the Child Tax Credit, and the Credit for Other Dependents. It does not transfer the EITC, Head of Household status, or the child and dependent care credit. Those always stay with the custodial parent—the parent the child actually lived with—and cannot be released no matter what any decree or Form 8332 says.

An example. A mother has the child 250 nights a year. She signs Form 8332 so the father can claim the dependency and the CTC. The father correctly claims the dependency and CTC. But if the father also claims the EITC for that child, he is wrong—the EITC was never his to claim, and the IRS will disallow it. The mother can still claim the EITC and file as Head of Household even though she released the dependency. If you are the custodial parent and the IRS denied your EITC because the other parent has a Form 8332, this is your argument: the form does not reach the EITC. (If a former spouse instead left you facing tax from a joint return you did not benefit from, that is a separate remedy—see How To Request Innocent Spouse Relief.)

The Bans: Why You Cannot Just Try Again Next Year

IRC Section 32(k) attaches escalating consequences after an EITC disallowance. These are the reason you must respond to the audit properly the first time:

Two-year ban. No EITC for the 2 tax years after a disallowance found to be "due to reckless or intentional disregard of rules and regulations (but not due to fraud)." Reckless disregard is a low bar—claiming a child you knew did not live with you can be enough. This is not limited to deliberate cheating.
Ten-year ban. No EITC for the 10 tax years after a disallowance found to be "due to fraud."
Recertification. After any EITC disallowance—even an ordinary one with no ban—you generally cannot claim the EITC again until you file Form 8862 ("Information To Claim Certain Credits After Disallowance") with a later return, proving you now meet the requirements. Form 8862 is for reclaiming the credit on a future return—it is not how you respond to the current audit; that is the documentation package described below.

The same ban structure applies to the CTC and the American Opportunity education credit, and Form 8862 covers all of them together. Do not file Form 8862 if the prior disallowance was a math or clerical error, or during a year inside an active ban—a ban year means waiting out the ban, not filing the form. The casual "they denied it, I'll just claim it again" approach is exactly what triggers a two-year ban. Take the audit seriously the first time.

Exactly What Proof the IRS Wants

The IRS does not want your explanation. It wants documents. It publishes two checklists telling you precisely what:

Form 886-H-EIC—what to send to claim the EITC based on a qualifying child.
Form 886-H-DEP—supporting documents for dependents.

For the EITC qualifying child, the IRS requires proof of all three: residency, relationship, and age. The form says it bluntly: "If you don't have or can't get the legal documents that we ask for, you can't claim EITC with that child."

Residency is the hardest and most contested. You need documents showing your US address, your name, the child's name, and dates covering more than half the year:

School records
Medical records (immunization records alone are often not enough)
Childcare provider records (from a provider who is not a relative)
Social service agency, placement agency, or court records
Dated letters on official letterhead from the child's school, health care provider, childcare provider, social service agency, employer, landlord or property manager, place of worship, or shelter

Temporary absences—illness, college, vacation, military service, juvenile detention—count as time lived at home. If you use a P.O. box, the IRS wants a stamped Form 1093 tying it to you.

Relationship. If you are the parent on the child's birth certificate, often nothing more is needed. Otherwise: birth certificates, court decrees, or paternity records that trace the relationship. For a grandchild, your child's birth certificate plus the grandchild's. For a niece or nephew, a chain of certificates sharing a common parent's name. For step-relationships, certificates plus the marriage license.

Age. Under 19 and younger than you—usually nothing. Age 19 to under 24—school records proving full-time student status and dates. Permanently and totally disabled—a letter from a doctor or agency confirming the condition lasts (or is expected to last) at least a year or to result in death and that the person cannot do substantial gainful work.

For dependents generally, Form 886-H-DEP adds a support-proof list when support is at issue: child-support agency statements, government-benefit statements, rental agreements or fair-rental-value statements, and utility, daycare, school, medical, and clothing bills with canceled checks or receipts.

The Evidentiary Traps That Sink Most Cases

These details, straight off the IRS forms, cause more failures than missing documents:

The documents must be for the tax year in question. A school letter for this year does not prove residency three years ago. Match the year exactly.
"We cannot accept documents signed by someone related to you." If your sister is the childcare provider, her letter will not work as residency proof. The signer must be independent.
Non-English documents need a certified legal translation.
One document can prove multiple elements if it shows the address, the parent's name, and the dates—a single good school record can cover residency and, sometimes, relationship at once.

Build the package the IRS asked for, addressed line by line to its checklist. The single biggest reason these claims fail in court is not that the taxpayer was ineligible—it is that the taxpayer never produced clean, independent, correct-year proof. See How To Prepare Your Evidence for Tax Court.

How to send it. Use the response form or fax cover sheet that came with your CP75 or Letter 566, and send the package to the exact address or fax number printed on that notice—not a general IRS address. Write your name and the Social Security number and notice number from the letter on every page. Keep a complete copy of everything you send. Mail it by a method that gives you proof of delivery—certified mail with return receipt, or a kept fax confirmation—and note the date you sent it against the response deadline on the notice.

The Burden Is on You

In Tax Court the IRS's deficiency determination is presumed correct, and you have to prove it wrong by a preponderance of the evidence. Credits are a matter of "legislative grace"—you carry the burden of showing you qualify for the EITC, the dependency, and the CTC.

IRC Section 7491 can shift that burden to the IRS on a factual issue—but it almost never helps in these cases. The shift only applies if you first introduce credible evidence and you substantiated your items and cooperated with the IRS's reasonable requests during the audit. The very conduct that produces an EITC disallowance—not responding to the CP75 or Letter 566, sending nothing, keeping no records—forfeits the shift. So plan on the burden being yours.

The good news: documentary evidence is exactly what wins these cases, and IRS Counsel frequently concedes once genuine residency and relationship proof appears. The case is usually won on paper, not on argument. Do not wait for a burden shift that will not come—build the proof.

The Path: From Disallowance to Tax Court

Here is how the dispute moves, and where it usually ends:

Correspondence audit. You get Letter 566 or a CP75. Respond with the Form 886-H-EIC and 886-H-DEP documentation. If the IRS accepts it, the credit is restored and there is no court case. Most disputes that are going to be resolved are resolved here.
Notice of Deficiency. If it is not resolved, the IRS issues the 90-day letter. Under IRC Section 6213(a), you have 90 days from the date on the notice (150 days if you are addressed outside the US) to file a petition in US Tax Court. This deadline cannot be extended and the protections it triggers only apply if you file in time. Filing a timely petition stops assessment and collection while the case is pending. See How To File Your Tax Court Petition.
Almost always a small case. Under IRC Section 7463, you can elect simplified "small tax case" (S case) procedure if the amount in dispute for any one year is $50,000 or less. EITC and dependency deficiencies are nearly always under that, so these are almost always S cases—informal, plain-English procedure, no rigid rules of evidence. The trade-off: an S-case decision is final, not appealable, and sets no precedent. For most pro se EITC petitioners that trade-off is worth it. See Small Case or Regular Case: Which Should You Choose.
Filing fee and waiver. The Tax Court filing fee is $60. If you cannot afford it, file the Tax Court's Application for Waiver of Filing Fee—a sworn statement of your income, assets, and debts. Given that EITC eligibility itself caps your income, most petitioners qualify for the waiver.
Most cases settle. IRS Chief Counsel reviews the petition. In EITC and dependency cases, producing the documentary proof at this stage usually produces a stipulated decision restoring the credit without a trial. Most (76%) of Tax Court cases close by settlement, and more than 99% are resolved without a trial on the merits. Cases typically take 6-18 months to resolve, with settlements often faster.
If you missed the 90 days: audit reconsideration. If the petition deadline lapsed and the deficiency was assessed, the fallback is audit reconsideration—asking the IRS to reopen the assessment by submitting the documentation you never provided. It is a discretionary administrative remedy, not a right, and it does not stop collection by itself while the IRS's 10 years collection clock runs. It still works in many EITC cases because the issue is purely documentary. See You Missed the 90-Day Deadline: Now What.

Get Help: You Almost Certainly Qualify for a Free Clinic

This is the strongest free-help situation on this site, because the eligibility math lines up perfectly:

You are low-income by definition—EITC eligibility caps your AGI well within Low Income Taxpayer Clinic limits (250% of the poverty line).
The amount in dispute is small—EITC and CTC deficiencies are well under the LITC dispute limit of $50,000.
LITCs handle exactly these cases every day: EITC audits, dependency disputes, correspondence-exam representation, and Tax Court small cases—for free or a nominal fee.

Contact a clinic at two moments: the moment you receive the CP75 or Letter 566, and immediately if you receive a Notice of Deficiency. The earlier a clinic is involved, the more often the dispute ends at the audit stage. See How To Find and Use a Low-Income Taxpayer Clinic.

If your situation is more complex—identity theft, a contested-custody overlay, multiple years, or a possible ban—see When To Get Professional Help With Your Tax Dispute. The Taxpayer Advocate Service can also help when IRS systems break down—a held refund, a misrouted document package, or a threatened levy while a response is pending.

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This article is for informational purposes only and does not constitute legal or tax advice. For advice specific to your situation, consult a qualified tax professional or attorney.