Hi candidate,
The best thing which you should do before the documentation starts is to get all the documents such as category certificate, domicile certificate, income certificate, and get It updated before the start of Counselling Process.
If you have somehow failed to to get the income certificate till date then you can surely submit the receipt of the Income Certificate, during the start of counselling process and try to make your certificate available till the Verification Center.
Hope that this answer helps you.
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile