Welcome to the Community, @Jon.
Yes, the transactions will still be available, as QuickBooks Self-Employed retains them for one year after cancellation. All you have to do is to login to your account through a web browser. Then, follow the on-screen instructions in the prompt to renew your plan.
I'm also adding these article to learn how to assign your transactions on the correct line of your Schedule C:
On the other hand, I'd like to share that QuickBooks has a Solopreneur product that serves the same functions as Self-Employed but with improved features. If you're interested in its features, you can check out this article: Introduction to QuickBooks Solopreneur.
Feel free to revisit this thread if you have additional QuickBooks concerns.
