Payroll Taxes
You can download US federal and state tax rates each year (typically available by December of the prior year) by going to Admin -> Payroll -> Start New Tax Year.
Check the boxes labeled Update Federal/State Tax Tables For Year Selected.
If you need to make any manual adjustments to the taxes, go to Admin -> Payroll -> Edit Tax Table or Edit Tax Type.
For the state taxes that you will be using, you will need to set a GL account for each state. Go to Admin -> Payroll -> Edit Tax Type -> State. Select a state and be sure to fill in the GL Account box (liability account). The system will prevent you from generating payroll payments until states that are used have a GL account set.
You can view withholding totals for payroll taxes by going to Payroll -> Reports -> Check Summary or Pay History.