The Tennessee Department of Revenue is no longer mailing business tax return forms to you if you are required to file electronically or if you voluntarily electronically file your business tax returns.
Due dates for each classification are:
Class 1 and 5: February 28
Class 2: May 31
Class 3: August 31
Class 4: November 30
If you are required to file your return electronically, and you instead file by any other means, you will be subject to a failure to file penalty.