Go to 888 washington blvd on the first floor. I work at the tax collection office (girl with pink hair you cannot miss it) but in person will also be cheaper. You can mail it, just go to the post office and make sure the date is stamped in front of you because we’ve had people send their check in on the 28th of the month, not get it stamped by the post office till like like 1st or 2nd and then they have to pay interest.