Niagara Falls sent thousands of letters stating that unpaid taxes must be paid in full by June 30, or homes will be foreclosed. Now, neighbors are voicing their frustrations with the sudden due date.3,000 neighbors in Niagara Falls who fell behind on their taxes got that letter in the mail. It said they owe every dollar for all city taxes since 2023 and all outstanding school taxes since 2025 by the end of the month.The city said that "property …