Hi there,
Kudos to your first post in the Community! It's important you know how the subscription for Protax works and I'd be happy to steer you in the right direction.
The good thing is that Protax allows you to go back 5 years. Since you've signed up today, you'd get the option to file for for 2020 and 5 years back. For more info on Protax, check out this helpful link here. For account specific questions, I suggest contacting our support team using this link here. Let me know if you have other questions.
Otherwise, enjoy the rest of your week! :)