obc ncl income mistake

I inadvertently mention in my obc ncl application during apply for it my own income instead of my parents that is respectively 1.5 lpa and 5.5 lpa. My father is businessman and they file income tax return. I joined Railway govt services level 1 post as unreserved category before 6 months before. There are two DV conduct one by RRC (Recruitment Agency) and 2nd stage by department. After first DV i realised mistake done by me then for 2nd dv i prepared new obc ncl with my parents income and submitted it to departmental dv. but i am afraid because 1st dv certificate not as per my parents income. Q1. In future department can take action against me. Q2. can i now cancel my reservation claim because my selection made through unreserved category at all stage of recruitment process and my age also under unreserved category. Q3. In future i have to return my all salary earn during service.