Here are the websites where you can access the following services: register to vote, check on your voter registration status, apply to vote by mail, and check on your mail-in ballot status. You can also find your polling place for in-person voting in an interacting search by residential address.
The websites offer the link to be a poll worker.
Pennsylvania Dept. of State: https://www.pavoterservices.pa.gov/Pages/SurePortalHome.aspx
VotesPa, an official government website dedicated to mail-in and absentee votes: https://www.votespa.com/Voting-in-PA/Pages/Mail-and-Absentee-Ballot.aspx
Find your County Elections office: http://votespa.com/county
Philadelphia Commissioner of Elections: http://www.philadelphiavotes.com
Voter Assistance Hotline [1-833-PA-VOTES]