If you’re making an estimated tax payment or paying with your return, you might see a little thing called Form 1040-V. This is just a payment voucher that you attach to your check. It’s not a secret code. It’s literally a piece of paper that says, “Hey, I’m paying money.”
Mail that along with your check to the address listed on the bottom of the voucher. Do not fold it, do not staple it, and for the love of all that is holy, do not include glitter. The IRS has a strict “no fun” policy on envelopes.
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Pro tip: Write your Social Security number and the tax year on the check’s memo line. That way, if the envelope goes AstroTurf, the IRS still knows whose money it is. It’s like naming your luggage before a flight.
