You can now pay your taxes for up to 5 weeks in advance. This option is now available if you use your information box at your property. You can only use the prepaid tax option if you are all paid up with your current taxes. If you are unpaid or overdue on taxes, this option will not be available.
If your property has been prepaid, it cannot be put up for sale until the time you have prepaid runs out. This limitation cannot be circumvented by customer support.