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    Integrations

    Excel and CSV import.

    Drop in a spreadsheet and Plain Dot handles column mapping, validation, TIN matching, and filing.

    What you get

    Smart column mapping

    We detect common headers automatically. Override mappings inline when needed.

    Pre-flight validation

    TIN format, address completeness, and amount fields are checked before submission.

    Error reports

    Download a clean error report for any rows that need fixing — edit and re-upload.

    Any flavor of CSV

    Comma, tab, semicolon, quoted, unquoted. If Excel can read it, so can we.

    From spreadsheet to IRS in minutes.

    Start free