If your co-operative society is withholding your property tax refund, you have options. While direct RTI against the society might not always apply, you can often obtain information through the Registrar's office. It's advisable to first issue a legal notice to the society and then escalate the matter to the Deputy Registrar or Registrar of Co-operative Societies. Consulting a local lawyer is also recommended to understand your specific agreement and state bylaws regarding property tax and information access.