Short Answer
If you missed the April 15, 2026 federal tax deadline for your 2025 individual income tax return, do not assume your refund, Earned Income Credit, or Child Tax Credit is gone. First sort your situation into one of four buckets: you filed an extension, you did not file, you already filed but are waiting, or you received an IRS notice.
If you requested an extension, the IRS says your filing deadline is October 15, 2026. That extension gives you more time to file the return. It does not give you more time to pay tax that was due in April.
If you did not request an extension, or you are not sure, the practical next move is to prepare and file a past-due return as soon as you can. The IRS says taxpayers should file all required returns even when they cannot pay the full amount right away.
First, Identify Your Situation
| Your situation | What to do now | Why it matters |
|---|---|---|
| You filed an extension | File the 2025 return by October 15, 2026 | The extension covers filing time, not the April payment deadline |
| You did not file an extension, or you are unsure | File the past-due return as soon as possible | The IRS says past-due returns should generally be filed the same way and to the same location as on-time returns |
| You received an IRS notice | Follow the address and instructions on the notice | The IRS says to send the past-due return to the location shown on the notice |
| You already filed | Track refund status, IRS notices, and account records | A delayed refund may involve processing time, missing returns, or IRS follow-up |
Use these steps for federal individual income tax. State income tax deadlines, extensions, penalties, and credits can differ, so check your state tax agency separately if you also owe a state return.
Check Your IRS Records Before You Refile or Guess
Before you start rebuilding the return from memory, check what the IRS already has. The IRS individual tax filing page points taxpayers to online account tools, payment records, transcripts, refund status, and filing resources.
For a late 2025 return, gather or verify:
- W-2, 1099, and other 2025 income forms
- Federal withholding and estimated tax payments
- Any IRS notice or letter you received
- Whether you have earlier unfiled tax years
- Social Security numbers or other taxpayer identification numbers needed for the return
- Prior-year return information if it affects filing or identity verification
If wage or income documents are missing, the IRS says taxpayers can contact the employer or payer and may use IRS transcript tools or Form 4506-T for wage and income information.
Do Not Skip the Refund and EITC Check
The mistake to avoid is deciding that a late return is pointless because April 15 has passed. If federal tax was withheld from your paycheck, or you made estimated tax payments, a refund may still be possible. If your income and household situation fit the Earned Income Credit rules, EITC may also matter.
The IRS past-due return guidance says taxpayers generally must file within three years of the return due date to claim a refund. The same page also warns that a taxpayer can lose the right to claim credits such as the Earned Income Credit if the return is not filed within that window.
That does not mean everyone qualifies for EITC. It means you should not skip filing solely because the return is late. A credit can only be claimed on a filed return.
Child Tax Credit Checks for 2025
If you have a child, check the Child Tax Credit, Additional Child Tax Credit, and Credit for Other Dependents before filing. The IRS describes the Child Tax Credit as a credit for families with a qualifying child, but the details are specific.
For 2025, the main Child Tax Credit eligibility signals include:
| Check | IRS rule to verify |
|---|---|
| Social Security number | You, your spouse if filing jointly, and each qualifying child must have a Social Security number valid for U.S. employment and issued before the return due date, including extensions |
| Age | The child must be under age 17 at the end of the 2025 tax year |
| Relationship | The child may be your son, daughter, stepchild, eligible foster child, sibling, half sibling, stepsibling, or a descendant of one of them |
| Support | The child must not have provided more than half of their own support |
| Residence | The child must have lived with you for more than half the tax year |
| Dependent claim | You must claim the child as a dependent on your return |
| Joint return | The child generally must not file a joint return, except for a return filed only to claim a refund of withheld or estimated tax |
| Status | The child must be a U.S. citizen, U.S. national, or U.S. resident alien |
2025 Child Tax Credit Amounts
According to the IRS Child Tax Credit guidance, the 2025 Child Tax Credit is up to $2,200 for each qualifying child. The Additional Child Tax Credit is the refundable part of the credit and can be up to $1,700 per qualifying child, depending on income. The ACTC has a $2,500 earned income requirement.
The IRS says taxpayers who meet all eligibility factors can receive the full Child Tax Credit for each qualifying child if annual income is not more than $200,000, or $400,000 for a joint return. Taxpayers above those income levels may still be able to claim a partial credit.
If a dependent does not qualify for the Child Tax Credit or Additional Child Tax Credit, check whether the Credit for Other Dependents applies. The IRS lists that credit at up to $500 for each dependent who qualifies, with its own identification and status requirements.
Where the Credit Goes on the Return
The Child Tax Credit is not claimed by writing a separate letter to the IRS. If you qualify, the IRS says to enter child and dependent information on Form 1040 and attach Schedule 8812, Credits for Qualifying Children and Other Dependents.
For a late return, keep the filing package organized around the return itself:
- Form 1040 for the 2025 tax year
- Schedule 8812 if claiming CTC, ACTC, or Credit for Other Dependents
- W-2 and 1099 information
- Withholding and estimated tax payment records
- Child and dependent identification information
- Any IRS notice that tells you where or how to respond
The IRS also offers an Interactive Tax Assistant path for checking whether you may qualify for the Child Tax Credit.
If You Owe and Cannot Pay in Full
File the required return even if full payment is difficult. The IRS past-due return guidance says filing and paying as much as you can may help limit interest charges and late payment penalties.
If you need more time to pay, the IRS says taxpayers may request 60 to 120 days of additional payment time through the Online Payment Agreement application or by calling 800-829-1040, with no user fee for that short-term option. Longer payment arrangements, such as installment agreements, have separate rules and should be reviewed through IRS payment options.
After You File
A past-due return is not finished the moment it is mailed or submitted. The IRS says an accurately completed past-due return generally takes about six weeks to process.
After filing, track three things:
- Refund status, if you expect a refund.
- IRS notices or letters, especially if the agency requests more information.
- Earlier unfiled years, because the IRS says it may hold refunds when one or more income tax returns are past due.
Quick Next Steps
- Open your IRS online account and check tax records, payments, transcripts, and notices.
- Confirm whether you requested an extension before the April 15, 2026 deadline.
- If you filed an extension, submit the 2025 return by October 15, 2026.
- If you did not file an extension, or you are unsure, prepare the past-due return now.
- Review withholding, estimated payments, refund possibility, and EITC eligibility before filing.
- If you have children or dependents, check CTC, ACTC, ODC, and Schedule 8812 requirements.
- If you owe tax, pay what you can and review IRS payment agreement options.
- After filing, watch refund status and respond to any IRS notice by the instructions printed on it.
Frequently Asked Questions
Not necessarily. The IRS says taxpayers generally must file within three years of the return due date to claim a refund, and that same timing matters for credits such as the Earned Income Credit. The key point is that you cannot claim the refund or credit without filing the return.
No. The IRS treats an extension as extra time to file, not extra time to pay. If tax was due, paying after the April deadline can still lead to penalties and interest.
Use the instructions in the notice. The IRS says a past-due return should be sent to the address shown on the notice when a notice has been issued.
According to the IRS Child Tax Credit page, the 2025 Child Tax Credit is up to $2,200 for each qualifying child. The refundable Additional Child Tax Credit can be up to $1,700 per qualifying child depending on income, and the ACTC has a $2,500 earned income requirement.
If you qualify, the IRS says to enter child and dependent information on Form 1040 and attach Schedule 8812, Credits for Qualifying Children and Other Dependents, to claim the CTC, ACTC, or Credit for Other Dependents.
The IRS says an accurately completed past-due tax return generally takes about six weeks to process.
Official Sources
- IRS filing deadlineInternal Revenue Service
- Past due returnsInternal Revenue Service
- Child Tax CreditInternal Revenue Service