You can file your mechanic liens in person at the Suffolk County Clerk's Office located at: 300 Center Drive Riverhead, NY 11901-3392. Phone: (631) 852-2000.Carefully examine all documents before you pay for the vehicle. On the 10th day of December, 2021, commence the taking of a tax lien on the following lots, tracts, pieces or parcels of land. The bill of sale must show the purchase price and the amount of out-of-state sales tax paid to the dealer. Suffolk County Tax Act states payment of taxes on a timely basis is the responsibility of the property owner even if a tax bill has not been received.