Missed October 15? File now. See how the late-filing penalty works, which IRS notices can follow, how penalty relief works, and the first steps to take.

Can't pay by October 15? File on time anyway. See how not filing and not paying differ, who can get an IRS payment plan online, and penalty relief basics.

Your extension ends Thursday, October 15, 2026. See what to file, how to file on time, what to do if you owe, and what happens if you miss it.