There are two things as the saying goes that are certain in life. I will address the latter here. This office is located in Bethel Park near my gym and I stopped in here to give them my 2015 return. When you enter it is almost like a bank since the staff is behind glass enclosures and there appears to be "teller" glass windows.
There is a sign telling you to silence your cellphone and you will be seen. I normally go here because I can't stand the Post Office and I hate sending money by mail especially checks. Also, when Jordan sends you a bill if you want a receipt then you must enclose a self addressed stamped envelope.
As I was giving my return to the lady at the window I inquired about paying my property taxes here since the area I live in is covered by their sister location down in McMurray, PA. She told me I could and they would forward my check over to them. She even agree to "stamp" my copy of the bill as "paid" so that I would have proof of timely payment.
They do offer limited online bill payment but at this point it is only your sewage. You can file your return online as long as you get the paper one in the mail to get the pin code.
Regardless staff is friendly and helpful and will answer any of your tax questions or real estate matters.