Viewing your employee's timesheets for more than a year is a great functionality, sstewart64.
As of now, we're unable to pull up the weekly timesheet from over a year ago in QuickBooks Online. I can see how this functionality would be beneficial to your business. I encourage sending feedback directly to our Product Development team. This helps us improve the features of the program. I'll show you how:
Go to the Gear menu and then select Feedback.
Type in your feature request in the description box.
Once done, click on Next.
Additionally, I've added these articles that'll help you manage and track timesheets accurately in QuickBooks: