W9 Forms for Business

Form W-9—Request for Taxpayer Identification Number and Certification—is one of the most commonly used IRS forms. If you’ve ever provided vendor or freelance services to a company, you’ve probably completed a Form W-9 as well as employees.

True to its name, individuals and entities use the form to provide their taxpayer identification number to entities that will pay them income during the tax year. Although employees may have to fill out a W-9 form, these are also mission critical for contractors, vendors and small businesses performing 3rd party services to another company (B2B).

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