What Form 1040-V is for
The IRS form says "What Is Form 1040-V? It's a statement you send with your check or money order for any balance due on the 'Amount you owe' line of your 2025 Form 1040, 1040-SR, or 1040-NR." It also says "If paying online at www.irs.gov/Payments, don't complete this form." RepeatForm does not decide whether you owe tax or how to pay it.