Hi there, @Girlie2. The simplest way to view your Sales Tax Returns for prior years in QuickBooks Online is to go to All Apps, then select the Sales Tax section. From there, open the Sales tax returns page, and use the filters to display the specific returns you’d like to see.

Additionally, you can view this helpful article that explains how to manage sales tax payments in the Tax Center: Manage Sales Tax Payments.
If you have further concerns about viewing your Sales Tax Returns, let us know. We’re always here to help.