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What is INtax?

INtax is Indiana’s free online tool to manage business tax obligations for:

INtax supports the following tax forms: ST-103, ST-103MP, ST-103P, ST-103CAR, WH-1, WH-3, TF-103, SF-900, SF-401, MF-360, WPC-103, TTG-103, GT-103DR, FAB-103, CIT-103, ALC-W, ALC-FW, ALC-DWS, ALC-M, ALC-PS, (OTP) CT-19, OTPM, and OTP-PACT.

INtax enables tax professionals, also known as service providers, to file and pay taxes on behalf of their clients.

New to INtax? We can help.

INtax Taxpayer Guide

INtax Tax Professionals Guide

Need more help learning how to use INtax?

  • We offer a range of sophisticated tutorials to help you learn how to use INtax.
  • Service providers can also use INtax.
  • We have a special INtax hotline for help with INtax? You may call 317-232-2240, Monday through Friday, 8 a.m. - 4:30 p.m. EST.

Find e-Mandate Business Organization Resources on INtax filing.

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