Thanks a lot, one question would i have to pay the sales tax if i sold in another state? and say i never sold anything in the state of rhode island? would i pay anything?
On your quarterly form it will direct you to categorize your income. Not all of it is subject to sales tax.
Normally, items shipped out of state are not taxed by the state they are shipped from. Also, non profit organizations like schools and churches are usually exempt from paying sales tax. And if you sell to another dealer who will be in turn selling the shirts to his customers, you would not collect tax from him since he will be taxing his end buyers.
You will determine what taxes are necessary for each job (state, city, county, etc.) and add that percentage onto the sell price of your shirts.
You are not being charged the tax, the customer is. You are just responsible for collecting it and remitting it to the government. So there are no deductions or credits as there are in income taxes. If you make $100 they will expect you to collect a percentage and remit it no matter how small it may be.