How do to I get back to my 2019 payroll setup to finish entering the prior payrolls?

Congrats on making your first post in the Community, @beth35. 

Let's clarify if we can get you back to the 2019 payroll setup in QuickBooks Desktop. 

To properly give you the best answer to your issue, I'll need to gather some information from you. 

Have you updated your payroll to the latest release? How long have you had Desktop payroll. 

Once I receive the information above, I'll be able to further assist you on this matter. I'll be waiting for your response.