* To find what your tax bill might be next year, go to avicalculator.phila.gov.
* If you own your house, you may be eligible for a tax break called the homestead exemption, which would lower the taxable value of your home. Go to phila.gov/opa to apply. The deadline is July 31.
* If you think the city overestimated your home's value, the deadline to file an informal appeal of your assessment is Sunday. Go to the same site listed above.