You must also attach federal form 706, United States Estate Tax Return. Town, School and County taxes are payable to the local Tax Receiver in each Town from December 1st to and including May 31st.Q: How can I get my current property tax bill? The PDF version of these forms are FILLABLE. They can be filled out electronically, then printed. After May 31st, any taxes plus penalty and interest must be paid to the Suffolk County Comptroller's office, located at 330 Center Drive Riverhead, NY 11901.