If you have a mail order/Internet business in New York State, and you have NYS customers, you need to charge sales tax on the eligible items at the rate of the location of the purchaser. This can seem quite onerous.
Fortunately there is an electronic Sales Tax Jurisdiction and Rate Lookup. You type in the street address and ZIP Code and it will generate the correct rate. Incidentally, trying to find a list of sales tax rates by ZIP Code would be fruitless, since ZIP Codes are no respecters of county boundary.
One thing this lookup does NOT do, however, is to indicate which counties have set aside, at the county level, the sales tax on individual clothing items that cost $110 or less. You need to check this chart.