TurboTax does not support tax year 2020.
If you filed a 2020 tax return and it was accepted by the state and you need to make changes to that return, then you would have to file a 2020 Amended state tax return.
Go to this West Virginia state website for prior tax year forms and instructions - https://tax.wv.gov/Individuals/Pages/IndividualsTaxFormsPriorYears.aspx
