NC Sales Tax Overlap Problem

Site URL: http://avabock.art

So in NC zip codes cross county lines. Sales tax rates change because the county taxes are different BUT the zip code is still the same. So right now I am having major headaches with my state as I will either be under charging or over charging people tax depending on which rate I use. Only one tax rate can be entered per zip code.  NC is saying that stay with Squarespace is my choice but compliance is required. I don't want to switch but this is a huge issue. Anyone have advice?

I would reach out to squarespace.

They might not know this is an issue, and I am sure they would be quick to fix it once they are informed.