Following documents they asked for salaried or self employed:
In order to initiate the request to increase your credit limit, following documents are required:
1) For salaried customers: Last 3 months salary slips. If the salary credit is with a different bank, 3 month salary credit bank statement is required
2) For self-employed customers: Latest ITR with acknowledgment (computation of income and profit and loss account statement)/ Form16 (Part A & Part B)
3) If you have salary account with Axis Bank, then please confirm so that, we can initiate the request without documents.
4) Kindly share your expected limit.
5) Kindly confirm the current work address.
6) Kindly confirm the last four digit of credit card number which you wish to increase the limit.
At that time I was holding 2 CC, Axis Flipkart and Airtel CC, I asked for LE for Flipkart which they processed after receiving 3 months salary slip and 3 months salary account statement.