How can I owe back taxes? My bill only shows that I owe for the current year?

Tax bills are issued for only the current fiscal year. Any taxes past due for the prior fiscal year are not included in the figures shown. Demand notices are sent to taxpayers when a balance is still due at the end of a fiscal year. By marking the new bills “plus past due” or “plus previous”, we are reminding them of that overdue balance and hope that it will prompt a call to this office.