Don't be late - You'll pay...File for an extension if neededIt is never a good idea to file a tax return late. The IRS, State of Ohio, and virtually every municipality will assess penalties on returns filed past the due date. If you simply run out of time, or don’t yet have all the needed information, it is perfectly fine to file for an extension.

An important change was recently made by the Ohio Department of Taxation in regards to the due dates of the Commercial Activity Tax (CAT) returns.