If you didn't file your 2018 federal tax return or request a filing extension by April 15, don't let that stop you from submitting your 1040 and paying your tax as soon as possible if you owe the IRS money. Acting quickly will help keep the penalties and interest you may owe from getting out of hand.
In addition to interest charged on the amount you owe, you could be facing separate penalties for both filing and paying late. The late-filing penalty is 5% of the tax due for each month (or part of a month) your return is late. If your return is more than 60 days late, the minimum penalty is $210 or the balance of the tax due on your return, whichever is smaller. The maximum penalty is 25%. The late-payment penalty is 0.5% of the unpaid balance for each month (or part of a month) the tax isn't paid. It can be as high as 25% of the unpaid tax. As you can see, the longer you wait, the higher the penalties grow.
If you have a good explanation for missing the filing or payment deadline, you might be able to avoid the penalty (but not interest). What's a good reason? Think fire, natural disaster, serious illness and the like. A lack of funds, in and of itself, is not a sufficient reason for failing to file or pay on time. If you want to request penalty waiver, attach a statement to your return fully explaining your reason for filing or paying late.
If you're confident you don't owe money to Uncle Sam, then there's no reason to worry. The IRS doesn't penalize taxpayers for filing a late return if they're due a refund.
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And, finally, what about your state tax return? The due date for most state tax returns was April 15. However, a handful of states give you more time to file your state tax return. If you live in one of those states, you might not have missed the deadline yet.
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