There are a few things that you should consider before fixing QuickBooks Error PS077.
Firstly, you have to check the QuickBooks payroll subscription is valid. If expired, then make it valid by paying the fee.
Your QB software must be updated with the latest released update.
Also, ensure to take a backup of your existing QuickBooks company file.
Billing info should be accurate.
In only one QuickBooks application on the system.
Once you have noticed and confirmed these things, you can go for the fixing process of QuickBooks Error PS077. Another way to easily get rid of this error is to talk with QB experts.