Do I need to upload a file in TNTAP if I have no activity to report for motor fuels?

No.  If you don’t have any activity to report for a period you can select that when filing.

• Log into TNTAP.
• Select the tax account you are filing for.
• Select “File Return.”
• When asked if you have any activity to report in this period, select “No.”
• Click “Next” and submit your filing.