What happens if you don’t update your address with the IRS?
Your IRS mail keeps going to the old address — and legally, that’s your problem, not the IRS’s. An IRS notice counts as delivered to your “last known address” whether you ever see it or not, so penalties grow and deadlines pass in silence. Filing Form 8822 closes that gap.
The “last known address” rule
Under federal tax law (IRC §6212(b)) and the implementing Treasury rules, the IRS may send legally effective notices to your last known address — the one on your most recent return or your last Form 8822. If that address is stale, the clock on a notice can start (and run out) while it sits in someone else’s mailbox.
What can actually go wrong?
- Penalties pile up. Miss a balance-due notice (CP14) and interest and late-payment penalties keep accruing.
- You lose appeal rights. Miss a 90-day Notice of Deficiency and you can forfeit the right to challenge the bill in Tax Court.
- A CP2000 goes unanswered. An under-reporting notice you never see can become an assessment by default.
- Your refund goes missing. Paper refund checks go to the address on file, and the IRS warns post offices don’t always forward government checks.
The fix is cheap and permanent
Mailing Form 8822 updates your last known address going forward. There’s no online option for individuals, and the IRS sends no confirmation — so do it promptly and keep your proof of mailing.
Don’t let a missed notice cost more than the move did. Fill Form 8822 online in about a minute, sign on screen, and we mail it Certified with tracking.
Update my address nowFree to fill and mail yourself; $14.99 if we mail it certified.
Common questions
What happens if the IRS has my old address?
Notices and paper refund checks keep going to the old address. An IRS notice is legally effective at your “last known address” even if you never receive it — so deadlines can pass without you ever knowing.
Can a wrong address cause me to miss a deadline?
Yes. If a 90-day Notice of Deficiency goes to an old address and you miss it, you can lose the right to challenge the tax in Tax Court — even though you never saw the letter.
Is it too late to fix it?
No. File Form 8822 now; it updates your “last known address” going forward. It’s cheap insurance against missed notices and lost refunds.
Sources: IRC §6212(b) and 26 CFR 301.6212-2 (last known address); CP14; 90-day Notice of Deficiency.