Additional Tax Payments with Form 1040-ES
Obtain Form 1040-ES by downloading the form from the IRS website or through the mail by calling the IRS at 1-800-TAX-FORM.
Input the identifying information requested in Payment Voucher 1 of Form 1040-ES. This identifying information includes your name, address and Social Security number as well as the name and Social Security number of your spouse. As the IRS uses this information to properly credit your payment, it is important the information you enter matches the IRS records.
Enter the amount of your additional tax payment in the "Amount" box of Voucher 1 of Form 1040-ES.
Make a check or money order payable, in the amount of your additional tax payment, to the "United States Treasury". Write your Social Security number in the memorandum portion of the check.
Mail the check and Voucher 1 of Form 1040-ES to the appropriate IRS service center as listed in the instructions to Form 1040-ES. IRS service centers are listed geographically. Mailing your payment and voucher to the wrong IRS service center may delay the IRS from recording your payment in a timely manner.
Obtain proof of mailing your payment and voucher, typically in the form of a certified mail receipt. This receipt may be used to prove a timely remission of payment. This step is optional.