Replying to you post in case it helps anyone filing their taxes in 2021
You can upload it from Stash via Apex Clearing.
Go tohttps://public-apps.apexclearing.com/session/#/login
Sign up as a new user using your account # from your Stash tax form and type in all your info.
Then go back on TurboTax and select Apex Clearing from there.
