When entering a manual amount for CPP in a timecard or on a manual cheque, the following error is displayed:
Invalid input. Cannot select an inactive Regular Pay Expense G/L Account. Employee [EMPID] Earning/Deduction/Tax [CPP]
This error message is referring to the expense GL account identified under Employer Expense in the CPP tax setup. Go to Payroll Setup / Income Taxes and open the CPP tax. Go to the G/L Dist tab and confirm all the GL accounts listed in the Employer Expense column are active GL accounts. Replace any inactive GL accounts with active ones - or set the inactive GL account to be active (in the GL).