To make a payment with Form 720-V (Payment Voucher), follow these steps: 1. Complete Part I of Form 720-V, providing your identification number, business name, and address. 2. Determine the payment method: Electronic Funds Transfer (EFT) or check/money order. 3. If using EFT, complete Part II and follow the instructions provided by the IRS for making electronic payments. 4. If using a check or money order, complete Part III and make the payment to the 'United States Treasury' with the form. 5. Mail the completed Form 720-V and payment to the IRS address provided on the form.