In the application i have put annual income 11000 but in income certificate it is 10000. What to do? Please suggest. I'm afraid.

Hello,
The admission to undergraduate medical courses through NEET to various private and government medical colleges throughout India has begun in most of the states.
Do not worry it is a minor error and will not creat any problem. However I suggest you to call the helpline number given on official site of your state's medical council and tell them your problem. They will help you on what to do to rectify the mistake.
So rest assured it won't create any problem.

For more follow this link
https://medicine.careers360.com/articles/neet-counselling
Good luck