Regarding Obc Certificate

Both of my parents are group c employee. their only source of income is salary. both of their salary together is more than 800000. while making obc certificate the tahsildar count salary and deny me to produce obc certificate. after that, a local advocate said me to not show salary in the application.I made a certificate my father as business and annual income of 60000.now I have got a govt, job.I have got my rank in unreserved category because of my merit. but I have produced my obc certificate also at the time of joining. sir,my problem is that is there any problem with my job in future. are the documents and affidavits,I produced during obc certificate making deleted after my certificate was approved. if I caught in future,how can I defence it in court. still our odisha govt revenue officials including salary and agriculture income while making obc certificate and they rejects it. what should I do against them.