I live in NYS and am under the impression that you pay sales tax where the seller is physically located. If I'm at a craft fair I charge tax from the county I am in. If I'm shipping from my home I charge the 8% for Niagara County. I'm very fortunate to have a son in law who's a tax professional.
I believe that is incorrect.
If you are at a craft fair, yes the tax rate is for that location, where both the buyer and seller are physically located at the time of sale. If you are shipping from home to anywhere within NY state, the tax rate is based on the recipient's address.
http://www.tax.ny.gov/bus/st/sales_tax_rates.htm