By your statement "I am on a rent to own with a promissory note. A promissory note indicate that the seller is carrying a note as oppose to a rent to own agreement.
If this is a promissory note as you indicate, this is the same thing a normal mortgage lender would do, carry the note with your paying the taxes and insurance
The thing that is sort of puzzling is the fact that your name is not on the title deed, which would lead me back too the fact that you are indeed on a lease or rent to own.
If this is the case then the owner is required to pay the taxes, however, the county tax assessor could care less who pay the taxes and would not ask for ID when paying he taxes.
It might be to your benefit to clarify your agreement with the seller.
I hope this has been of some benefit to you, good luck.