Through the turbotax app, I set my mailing address in PA, which is where i get my mail. But my address is in NJ, as I moved here in late august of 2018. I filed my hours worked in NJ as a resident, bu

[re2boys]

If you moved from PA to NJ during calendar year 2018, you will need to file two part year tax returns. Any income earned while a resident of PA would be reported on a PA part-year return.  Any income earned while a resident of NJ would be reported on a NJ part-year return.

[cjn623]

Oh I got cut off, my question was why I have NJ non resident and NJ resident taxes to pay when I have paid PA taxes all year

[re2boys]

You should only file one NJ return--a part year resident return.  I'm assuming you moved from PA to NJ August 2018.
Did you not notify your employer that you moved to NJ???  If you did not, then your employer continued to withhold PA income taxes.