The locality withholding from Box 19 of Form W-2 Wage and Tax Statement does not transfer to the Pennsylvania return. The locality withholding would only transfer to your federal return, Schedule A (Form 1040) Itemized Deductions, Line 5, for itemized deductions.
If you have more than two local withholding amounts, you can combine the amounts of your locality withholdings and enter that amount on Form W-2 in Box 19, then select "Pennsylvania" for the locality name in Box 20.
Note that any link in the information above is updated each year automatically and will take you to the most recent version of the document at the time it is accessed.