Note: Some addresses may not match a particular instruction booklet or publication. This is due to changes being made after the publication was printed. This site will reflect the most current Where to File Addresses for use during Calendar Year 2021. Addresses for Forms Beginning with the Letter W Form Name (For a copy of a Form, Instruction, or Publication) Address to Mail Form: W-2 Wage and Tax Statement Employers:Where to mail your paper Forms W-2 W-7 Application for IRS Individual Taxpayer Identification Number W-7(SP) Spanish Version - Application for IRS Individual Taxpayer Identification Number Internal Revenue Service, ITIN Operation P.O. Box 149342 Austin, TX 78714-9342 W-7A Application for Adoption Tax Identification Number Department of the Treasury Internal Revenue Service Austin, TX 73301-0066 Form W-12 IRS Paid Preparer Tax Identification Number (PTIN) Application and Renewal IRS Tax Pro PTIN Processing Center 104 Brookeridge Drive #5000 Waterloo, IA 50702 Allow 4-6 weeks to receive information about your PTIN.