ADP tax with holdings

I have recently started a new job in the month of August.

So, ofcourse my full years salary won't be available or deposited tome.

But would ADP put my payroll taxes as such it be covering whole year or part year?

For example: If I would have worked throughout the year, my tax would be 'x' amount deducted. But the way payroll has been setup, would they going to deduct '2x' my taxes to catch up for the withholdings thinking my yearly salary is A, but itself its ONLY A/2, since I have started working in half of the year.