If you choose to mail your IRS tax payment:
Make your check, money order or cashier's check payable to U.S. Treasury.
Enter the amount using all numbers ($###.##).
Do not use staples or paper clips to affix your payment to your voucher or return.
Make sure your check or money order includes the following information:
Your name and address
Daytime phone number
Social Security number (the SSN shown first if it's a joint return) or employer identification number
Tax year
Related tax form or notice number
