If you would rather vote in-person on Election Day, but you have already received a mail-in ballot, just bring your full mail-in voting packet to your Pennsylvania polling place. There, poll workers can officially void that mail-in ballot, and then get you ready to vote at the voting machines. It’s that easy.
Just remember to bring the ballot and the pre-addressed outer return envelope to your polling place. You need both of those things to void your mail-in ballot.
If you don’t have your mail-in ballot and pre-addressed outer return envelope, and still want to vote at the polls, then you will have to vote via a provisional ballot, which are among the last votes to be counted.