Never filed Form 8843 or a tax return? How F-1 students catch up

What happens if I never filed Form 8843?

There is no fine for a late Form 8843, but IRS sources differ on whether filing late can cost a student the right to exclude their days. File every missed year now.

Form 8843 is how you tell the IRS to leave your days as a student out of the substantial presence test (IRS). The form's penalty paragraph names only two groups: professional athletes, and people kept in the US by a medical condition. For them, a late form can mean their days count toward US residency.

The paragraph adds an exception: no penalty if you show "by clear and convincing evidence" that you took reasonable steps to learn and follow the rules (2026 draft Form 8843). The regulation behind the form lists the statements this penalty covers, and the student statement is not one of them (26 CFR 301.7701(b)-8).

The IRS substantial presence test page reads more broadly. It says that if you do not file Form 8843 on time, you cannot exclude the days you were present in the US "as an exempt individual". The exception is if you can show the same reasonable steps by clear and convincing evidence (IRS). IRS training material says that not filing "could affect the taxability of income or treaty benefits" (IRS Link & Learn).

How do I file Form 8843 for an earlier year?

Use the Form 8843 for that year and complete every entry. Then sign it and mail it to the IRS in Austin, Texas, one form for each missed year.

1. Download the form for the year you missed from the IRS prior-year forms page. Each form asks about its own year: line 4a of the 2026 form asks for your days in 2026 and the two years before it.
2. Complete Part I and, as a student, Part III. J-1 researchers and other teachers and trainees who are not students complete Part II instead (Form 8843 guide).
3. Fill in every line, including both addresses, because a Form 8843 filed alone must be complete. If you have no SSN or ITIN, leave that box empty: the form asks for one only "if any".
4. Sign the form and date it with the day you sign. You sign Form 8843 only when you file it by itself.
5. Mail it to Department of the Treasury, Internal Revenue Service Center, Austin, TX 73301-0215. That is the address on the 2024, 2025 and 2026 forms; check "When and Where To File" on the form you use.

We recommend one envelope per year, sent by Certified Mail, so each form has its own proof of mailing. The mailing guide explains the postmark rule.

How do I count my US days for a year that is long past?

Start from your I-94 travel history on the CBP website, which shows up to 10 years of arrivals and departures. Check it against your passport stamps and tickets, because the history can miss land departures and is not an official record (CBP).

Count the day you arrived and the day you left as full days in the US, because any part of a day counts. On line 4a, enter your actual days in that year and in the two years before it. On line 4b, enter the days of that year you exclude. For a student who spent the whole year in student status inside the five-year limit, that is every US day of that year.

Then work out which of your five years each missed year was. Students are exempt for 5 calendar years, and any part of a year counts as a whole year (IRS). A student who arrived in August 2022 has 2022 to 2026 as years 1 to 5. J-1 researchers and scholars usually get 2 calendar years instead (J-1 researchers).

If a missed year was your sixth calendar year as a student or later, you may have been a resident alien that year, and a different return applies. Read your sixth year on F-1 before you file anything for that year.

What does a late Form 1040-NR cost?

A late Form 1040-NR costs no penalty if the IRS owes you a refund, because both penalties are a percentage of tax you still owe. If you owe tax, you pay penalties plus interest from the original due date.

"Tax owed" here means the tax on the return minus your withholding and other credits. In a month when both penalties apply, the late-filing penalty is reduced by the late-payment penalty. The minimum is set for the year in which each return was due.

Waiting too long has a cost even when you are owed money. A nonresident who files Form 1040-NR more than 16 months after its due date can lose deductions, such as state income tax on Schedule A (26 U.S. Code 874). The credit for tax withheld is kept. For a 2025 return due April 15, 2026, the 16 months end in mid-August 2027. For 2023 and earlier returns, and for a 2024 return due April 15, 2025, the 16 months have already passed.

If you also skipped the year before, the cutoff can come sooner: on the date the IRS writes to you about the missing return. The regulations let the IRS waive the rule for a filer who acted in good faith.

How long do I have to claim a refund from a missed year?

You have three years from April 15 of the year after the tax year. Tax withheld from your pay counts as paid on that April 15, so the last day to claim a 2023 refund is Thursday, April 15, 2027 (26 U.S. Code 6511).

The IRS applied the same rule to tax year 2022: the last day to claim a 2022 refund was April 15, 2026. Refunds not claimed in time go to the US Treasury (IRS).

If your only withholding was on a Form 1042-S, the date can differ slightly, so treat April 15 as your last day. The same three-year rule covers Social Security and Medicare tax taken from your pay by mistake: for 2023 pay, the last day is also April 15, 2027 (FICA refund guide).

How do I file a late Form 1040-NR?

File it the same way as an on-time return, on that year's forms. The IRS says to send a past-due return to the same place as an on-time return, or to the address on any notice it sent you (IRS).

1. Download that year's Form 1040-NR with its instructions and Schedule OI from the prior-year forms page. Figures change between years: the standard deduction that students from India can claim was $15,750 for 2025 and is $16,100 for 2026 (India tax treaty).
2. Attach copies of that year's W-2 and 1042-S forms to page 1, and attach that year's Form 8843. The Form 1040-NR guide walks through the lines.
3. Sign and date the return. An unsigned return is not a valid return.
4. Mail it. For returns filed in 2026, the IRS address for a Form 1040-NR without a payment is Department of the Treasury, Internal Revenue Service, Austin, TX 73301-0215. With a check or money order, it is Internal Revenue Service, P.O. Box 1303, Charlotte, NC 28201-1303. The IRS says these may change for returns filed after 2026, so check its where-to-file page before you mail.
5. If you owe tax, pay it when you file, because interest grows until you pay.

An ITIN expires if it was not included on a federal tax return for three tax years in a row. You renew it with Form W-7 sent with the return, to the ITIN address in the W-7 instructions rather than the 1040-NR address (ITIN guide).

If you worked in a state with an income tax, you may have missed a state return too. Each state has its own late-filing rules, which this guide does not cover (state taxes).

F1TaxReturn prepares Form 1040-NR and Form 8843 for free as paper returns, but only for the current filing year: tax year 2025 until the final 2026 forms are out. It does not handle income reported on Form 1042-S. For older years, fill in the IRS forms yourself.

What does catching up look like for three missed years?

Each missed year gets its own forms, chosen by what happened in that year. The example below shows the forms and day counts for one student, then the penalty arithmetic if he owed tax.

What to do next

1. List every calendar year you were in the US as a student, from your arrival year through 2025. Mark the years with wages or a scholarship.
2. Download each year's Form 8843, and Form 1040-NR for the years with income, from the IRS prior-year forms page.
3. If tax was withheld in 2023, mail your 2023 Form 1040-NR by Thursday, April 15, 2027.
4. Mail each Form 8843 that you file alone to Department of the Treasury, Internal Revenue Service Center, Austin, TX 73301-0215, by Certified Mail.
5. File tax year 2026 on time: by Thursday, April 15, 2027 if you had wages, or by Tuesday, June 15, 2027 if you had none. A Form 8843 filed alone is due on that June date too.