 And then the filing requirement is at April 15, 2024, if you don't have any extensions. If you try not paying until April 15, 2024, you will still get hit with the stick of penalties and interest. Remembering our goal here is not to get hit with the stick of penalties and interest. That means that we want to basically withhold and pay throughout the year with withholdings or estimated tax payments, shoot for a bit of an overpayment to get a refund, not just because we like getting money from the IRS or check from the IRS if it's our own money they're giving back to us, but because we're trying to avoid the penalties and interest. Okay, if you file after this date, you may have to pay interest and penalties. That's the stick we're trying to avoid. So see interest and penalties later. So if you were serving in or in support of the U.S. Armed Forces in a designated combat zone or a contingency operation, you may be able to file later. See publication three, four details. So if you are in the military, thank you for your service. If you're in a designated combat zone, that sounds like a dangerous situation and the IRS is gracious enough to give you a little bit more time to file your tax return in that case. So that's nice of them. So if you e-file your return, there's no need to mail it. However, if you choose to mail it instead, filing instructions and addresses are at the end of these instructions. So it used to be of course that we typically had to mail, snail mail, the tax returns in which caused a huge problem on the tax due date, oftentimes lines forming at the post office at that point. The IRS has more and more tried to get people onto the email system in part because that's of course easier.