You need to print and mail it now. Did you fill out a state return for 2020? If not you need to use the Desktop program to finish it. Did you use Turbo Tax Online to file Federal?
How to finish a return you started online
https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-finish-a-prior-year-return-that-i-started-in-turbotax-online/01/26322
Or get the State forms from the state website and fill them out by hand.
You must have the 2020 TurboTax program and complete your federal return which will then populate your state return with the required information for state filing. If you have already filed your federal return you can just print your Arkansas return and mail it.
Why are you exempt from Arkansas tax?
I filed 2020 federal but apparently I did not file state of Arkansas with it how can I go back and file it now?
@Smilam133 The only way a 2020 return can be filed is by mail.
If
you prepared a 2020 federal return using TurboTax you can download the CD/download software to prepare a 2020 state return on a full PC or Mac (not on any sort of mobile device) or you can get the paper forms from the state and prepare it by hand.