Yes, you can mail the return with the payment in one envelop.
If you choose to mail your 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
You can look up the address to mail the return and payment here: IRS Where to File Paper Tax Returns With or Without a Payment
