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What is the file format required for bulk TIN Matching submissions?

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  • IRS TIN Matching

For bulk TIN Matching submissions, the required file format is typically a plain text file (.txt). In the IRS Bulk TIN Matching file format, fields are separated by semicolons (;). Each record in the file should follow this structure:

  1. TIN Type (1 for SSN, 2 for EIN).
  2. TIN (9-digit number).
  3. Name (up to 40 characters).
  4. Optional Account Number (up to 50 characters).

The IRS Bulk TIN Matching Program allows files to contain a maximum of 100,000 rows per submission. Each file must follow the specified format and can be uploaded through the IRS e-Services portal. For larger datasets, users must split their data into multiple files, each adhering to the 100,000-row limit.

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