Thank you for using justanswer. You should be able to find the information you need at the below link:
PHILA.GOV | Welcome to the City of Philadelphia
Look to the right hand side of the home page under "Make a payment" and below that to "Real Estate Taxes"
Real estate tax history on a piece of property is now a matter of public record, so if all of the information you are looking for isn't contained in that website, the phone numbers to the different departments are, and you may phone the city treasurer and they can either give you that information or direct you to the proper number.
I hope this helps and best of luck to you.
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