Gotta wonder how many returns are gonna get run through unauthorized AI tools by IRS employees this year, leaking private financial information into future training sets.
An IRS Form 4868 is a request to extend the filing date for six months. It's always granted and you're expected to pay your estimated taxes in the meantime.
I always owe, since I don't care to give this government a free loan of my money for a year or more at a time. I also have other documentation which isn't always ready by April of the filing year. So I file later on and pay whatever small amount of interest they charge, which is cheaper than a credit card or bank loan.