You missed it. It's a Box 14 deduction in your W-2. For PA, it's usually something like "SUI". Enter that and Turbo Tax will ask you about the deduction. It should be in the form of a drop-down menu where you will find it mentioning State Unemployment Insurance or PA unemployement tax, something like that.
To some, the glass is half full. To others, the glass is half empty. To an engineer, it's twice the size it needs to be.