I created a repeating journal entry to accomplish this. it isn't quite as elegant but it works. I have a debit going to each payroll line item and then a credit to a tax liability account and a credit to the checking account. I just use it for the static payroll entries. however, you could have it just sitting there, select the USE option from the dropdown on the right on the entry in the recurring transaction screen which copies the transaction for a one-time use. Then you could modify the amounts if you needed it. It would become a template for those transactions.