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Contact Treasury About the R&D Tax Credit

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    Business Tax eService

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  • Talk to a Customer Service Representative:
    517-636-6925

    Hours: Monday – Friday, 8:00 AM – 4:30 PM

    Taxpayer Verification

    To speak with a Treasury representative, you must provide the following details:

    • Federal Employer Identification Number (FEIN)
    • Business Name
    • Officer / Owner / Legal Contact Name
    • Tax Type(s)
    • Tax Year(s) and/or Tax Period(s)