PA w-2 with 2 states listed but only one with state tax withheld, prepare w-2 addnl info statement?

My daughter moved to PA over half way through the year to start a job.  She has one w-2 from her PA employer.  The W-2 shows total wages in Box 1 and also the same total wages amount in Box 16 for PA with state income tax withheld.  There is also a smaller Box 16 amount listed with NC as the state but no state income tax withheld.   This is the part of her wages paid to her before her physical address changed to PA.  So, the employer is in PA and all taxes withheld were for PA.  On the TurboTax screen "Any special PA w-2 situations?" the box is automatically checked for "you earned income in another state".   We assume this is correct, but the next screen asks to prepare a w-2 additional information statement.  What would she explain here?  It's already on the w-2 showing both states.