Customer Notice: Due to COVID-19, ADOR's in-person lobby services are by appointment only and in compliance with local municipal and county face covering policies.
Your Responsibilities as a Tax Preparer
Penalty Abatement Request: Use Form 290 to request an abatement of non-audit penalties.
Approved Tax Software Vendors
E-File and E-Pay Requirements and Penalties
Forms Technical Information
The most compatible browsers for forms are Internet Explorer or Mozilla Firefox. If you are using Google Chrome or Safari and see a blank/warning/error message, please view the form within your computer's Download folder instead of online.