All vendors selling anything must be in compliance with the NYS Sales Tax Department. 

It is free and easy to apply for and receive a sales tax number from the state.

Anybody may apply and be approved, regardless of where they live, their age, or whether they are applying as an individual or company. 

You do not need an attorney or an accountant to apply.

Be aware that If you are not in compliance you are subject to whatever penalties they impose should they visit you at any event.

You may apply for a Tax ID number online www.businessexpress.ny.gov or you may mail Form DTF-17 to them.

Their phone number is  518-485-2889.

They are easy to reach and will answer any and all questions you may have.

In addition to the above, food vendors selling from tables or trucks must be in compliance with the Nassau County Health Department.

If you are planning to sell any kind of food, you should call them to avoid problems should they visit you at an event.

Be aware that If you are not in compliance you are subject to whatever penalties they impose should they visit you at any event.

Their phone number is 516-227-9717.

They are easy to reach and will answer any and all questions you may have.