The number you claimed on your W-4, at work, was just an estimate. You don't enter it anywhere on your actual return. It does not lock you in on what you can claim, at tax filing time. The IRS does not try to match that number with the actual number of exemptions you end up filing for, nor does TurboTax (TT). TT knows nothing about your W-4.
What you claimed on your W-4 does determine how much federal withholding you had and that is shown in box 2 of your W-2. You enter your W-2 (not your W-4) in TT. TT enters your withholding on your tax form and you (usually) get some of it back,
