QuickBooks Error PS077 is a payroll-related problem that halts software updates, usually appearing when the program cannot validate its license key or tax files. Such issues may be caused by outdated QuickBooks Desktop, corrupted company data, or incomplete installation. Solutions involve verifying payroll service enrollment, re-installing QuickBooks, and updating files to the latest version. These steps will help keep payroll calculations correct and timely. If you can’t overcome Error PS077 on your own and payroll updates still fail with errors, get expert guidance right away at 866-408-0444 to restore operations quickly.