File or extend — now
With April 15 looming, the IRS and Taxpayer Advocate say request an extension if you need more time to file — but remember an extension gives six more months to file, not to pay any tax owed ( ). If you owe tax, pay by April 15 to avoid a roughly 5% monthly penalty on unpaid amounts; and if you mail returns ask the post office for a manual postmark because recent USPS timing changes can effectively move your deadline earlier for paper filers ( ).
If your tax return is not ready by Wednesday, April 15, the safest move is to file for an extension now, because the Internal Revenue Service says the request itself must be in by the original deadline. An approved extension usually moves the filing deadline for individual returns to October 15, 2026. (irs.gov; taxpayeradvocate.irs.gov) The catch is that an extension covers the paperwork, not the bill. The Internal Revenue Service and the Taxpayer Advocate Service both say any tax you expect to owe is still due on April 15, even if your full return comes months later. (irs.gov; taxpayeradvocate.irs.gov) If you miss the payment deadline, the Internal Revenue Service charges a failure-to-pay penalty of 0.5% of the unpaid tax for each month or part of a month, up to 25%. That is about $5 a month for every $1,000 you still owe, before interest is added. (irs.gov) The extension itself is simple. Individual filers can submit Form 4868, or they can get an automatic extension by making an electronic tax payment and marking it as an extension payment. (taxpayeradvocate.irs.gov; usa.gov) That means even a rough estimate is better than doing nothing. The Internal Revenue Service says taxpayers should file or request an extension even if they cannot pay in full, because that can reduce penalties compared with missing the filing deadline entirely. (irs.gov) There is a second deadline trap for people who still mail paper returns. The Taxpayer Advocate Service says new United States Postal Service postmark rules can make the official postmark date later than the day you actually dropped the envelope off. (taxpayeradvocate.irs.gov) Under the federal timely-mailing rule, the postmark is what usually proves your return was sent on time. If that postmark lands on April 16 instead of April 15, your return can be treated as late even if you put it in the mail the day before. (taxpayeradvocate.irs.gov; dispatch.com) That is why tax advisers and news reports are telling paper filers to walk the envelope to a postal clerk and ask for a manual postmark. A hand-applied postmark gives you a same-day acceptance record that a blue collection box may not. (taxpayeradvocate.irs.gov; fastcompany.com) So the practical play for the next few days is narrow and boring in the best way: file electronically if you can, request an extension if you need it, and send payment by April 15 if you expect to owe. If you insist on paper, do not trust a last-minute mailbox drop to prove the date. (irs.gov; irs.gov; taxpayeradvocate.irs.gov)
