Forecasting payroll expenses

Hi Everyone. Anyone have any opinion on typical or best practices for including payroll taxes in A/P? Our accountants do payroll once a month at the beginning of the month, let me know the amounts based on the current tax tables and I do the journal entries showing all of the specific payroll taxes. My VP wants to be able to account for these taxes or somehow track or forecast them because we are a startup and money is tight. Does anyone have any thoughts or best practices on how Payroll is forecasted? Inputting a bill in AP? If it's just not done, I need to tell him that... thoughts?

TYIA!!