Not clear if I was TN resident and owe Hall Tax for 2020

I have spent only 21 days in year 2020 in the state of TN before moving out. I have more than 1250 income in 

stock dividends this year. It is not clear to me if I need to file TN state return this year and if so then how will it be pro-rated? 

 

PS: I also have more than 1250 in interest from bank but from what I'm seeing this is NOT taxed at all.

 

thank you

 

Hall Tax Guide:
https://www.tn.gov/content/dam/tn/revenue/documents/taxguides/indincguide.pdf