What is address to mail 1040 form for 2010?

To mail your 2010 Form 1040, you'll need to send it to the appropriate address based on your state of residence. For most taxpayers, the address is: Internal Revenue Service, P.O. Box 37008, Hartford, CT 06176-0008. If you're enclosing a payment, the address is: Internal Revenue Service, P.O. Box 37004, Hartford, CT 06176-0004. Always verify the address on the IRS website or the form instructions to ensure accuracy.