Itr returns for bank loan

Dear All, 

One of my client maintain proprietorship form and his started business on FY 2017-18 and his turnover is Rs. 11.00 Lakhs.

He decided to go to Bank loan ( SBI ) for the FY 2018-19 for business extention purpose. Banker asked for Latest filed ITR. 

The please suggest the following doubts.

1. Which ITR to be filed.

2. Which details asked by bankers ( only ITR and bank statement enough).

3. we are not maintained Balance sheet and P & L A/cs .

Please suggest as early as possible