Hi,
I'm sorry to tell you that this site doesn't address sales tax questions (it's for personal income taxes). That said, here are a couple of links that may help you.
https://www.revenue.pa.gov/TaxTypes/SUT/OnlineRetailers/Pages/default.aspx
https://files.nc.gov/ncdor/documents/files/sd-18-6_0.pdf
I highly recommend that you contact the NC (1-877-252-3052) and PA (717-787-1064) departments of revenue to get any necessary clarification.
Hope this helps!
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Best,
Karen
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"