I'm experience some strange behavior with the payroll series in GP 2015.
When posting paychecks the employers tax expense is not posting to the accounts I have specified in the payroll posting accounts window. I also don't have a way to know if it's even calculating these amounts during the check run as I don't see them listed on any of the check posting reports.
I have both FIC/ME and FIC/SE assigned an account with ALL ALL.