Hi Purnima, 

From what I can understand, you have completed the document verification process, but encountered an error from your side related to your parents' income. If you have submitted these documents at the institute you are about to take admission in, I would suggest you to consult the college admission Office as they would have their own regulations pertaining to that. However, usually it has no impact over the admission of the candidate also since you do not fall under any special category.