Frequently Asked Questions

The Ohio Department of Taxation has compiled a list of frequently asked questions covering many different categories.

To view the questions, click on the "Select Category" bar and then click on the category you are interested in.  A list of questions will appear pertaining to that category. Then click on the question you are inquiring about and the answer will appear.

Why have I received an Activity Notice ANAT0001?

Since your initial billing, we have received additional information that indicates an increase in your tax liability for the period reflected on the notice. If you disagree with the notice, please provide supporting documentation in the envelope provided and include the payment voucher. To avoid additional penalties and interest, submit payment by electronic funds transfer on the Ohio Business Gateway at or send your payment, along with the payment voucher and/or additional information in the envelope provided within 20 days from the date on the notice.