How to Verify Vendor Tax ID’s and Employee Social Security Numbers in GP - Dynamics GP Support in PA - CSSI Technologies LLC

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How to Verify Vendor Tax ID’s and Employee Social Security Numbers in GP

Verifying Vendor Tax ID’s & Employee Social Security Numbers

This is not exclusively for GP users but a helpful tip for anyone who files 1099 and W-2 forms. The IRS and the Social Security Administration (SSA) both offer free online tools for taxpayers (payers/employers) to validate taxpayer identification numbers and social security numbers.

You can access these tools from the IRS website below.

Taxpayer identification number (TIN) matching tools | Internal Revenue Service

Why This Matters: Risks of Not Verifying Payee Data

Without proper verification:

  • Names and TINs may not match IRS/SSA records, triggering backup withholding, filing rejects or errors, or penalties.
  • Employees might not get correct credit for their earnings if W-2s are wrong (wrong SSN/name).
  • You may need to file corrections (e.g., 1099-Corr, W-2c), which is time-consuming, and potentially subject you to late-filing penalties.

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