Full payment is due and payable June 1 through July 1 without penalty.
For payment received after July 1, penalties will be added at 5% for the first month and an additional 1% of interest for each month or fraction thereof until paid. Payments by mail containing no U.S. Post Office postmark date shall be deemed to have been made on the date that payment is received. A postage meter postmark is not acceptable. Penalties and interest for late payment of taxes cannot be waived.
If you place mail into a mailbox or leave it at a post office without requesting a manual postmark, then the piece of mail wont be postmarked until it arrives at a USPS processing facility. As a result, the postmark date may be later than the date the item was collected or submitted at a USPS retail location.