In NYS just ask for a farmer exemption certificate or better yet go online to NYS tax forms and print up some forms to have with you. When you fill out a form for each vender you buy from, check the box that says Blanket Certificate. This should apply to all producers who are "trying to make a profit" and show your sales/expenses on your taxes. Hobby maplers who do not sell or who do not want to keep records can not claim exemption. Make note that you do not need to show a profit to be considered trying to make a profit. Please note, I am not an accountant nor attorney nor do I play one on TV.
Dave Klish, I recently bought a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.