I don't know why people can't seem to give you a straight answer. PA State Income Tax is levied at 3.07%.

If you expect more than $8000 of PA taxable income in the year that won't be subject to employer withholding you are required to file estimated taxes quarterly. This may or may not apply to you depending on your revenue and expenses. https://revenue-pa.custhelp.com/app/answers/detail/a_id/246/~/who-should-make-estimated-payments-for-personal-income-tax%3F

You may or may not be able to qualify for Tax Forgiveness: https://www.revenue.pa.gov/TaxTypes/PIT/TaxForgiveness/Pages/default.aspx

Good luck.