Payments for what? A 2023 tax due or quarterly estimated payments for 2024 next year? A tax due payment is one 1040V voucher. Estimates for next year are four 1040ES slips dated for 2024. You can mail in a check
OR You can pay directly on the IRS website https://www.irs.gov/payments
Be sure to pick the right kind of payment and year.....2024 Estimate Or 2023 Tax due