W9 Forms 2024. The w9 is a formal request for information about the contractors you pay, but more significantly, it is an agreement with those contractors that you won’t be withholding income tax from their. The original line 3—federal tax classification has now been split into two sections, line 3a and line 3b.
Understand the process for obtaining a tax identification number and certification. Businesses should request a w9 from all vendors.