You should send a request for filing extension in writing, before the original return due date if possible, to revenue.support@tn.gov, or you may mail it to:
Tennessee Department of Revenue
Taxpayer Services Division, 8th Floor
500 Deaderick Street
Nashville, TN 37242
Your request should include an explanation of why you need the extension and the amount of extra time you need to file. For more information, see Important Notice 17-19.
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