Yes, you can file RTI for obtaining Copies of your Property Tax Receipts.
RTI can be filed to seek Copies of Property Tax Receipts from the concerned BBMP Ward Office. BBMP is a State Governed Body by Karnataka Municipalities Act, 1964. BBMP is a "Public Authority" under Section 2 (h) of the RTI Act.
You can file RTI Application to BBMP by paying the prescribed fee to the concerned Ward Office to obtain Copies of your Property Tax Receipts.
To know the further procedure to file RTI Application please refer https://onlinerti.com/how-to-file-rti-online-for-karnataka