Dear Gautam,
You don't need any other documents. How many number of people you employee in your organization?
Yes, you will be eligible for deduction. However, if the tax department feels that the amount is high, they can disallow it. However it does not seems to be high.
If her income is below taxable limit, she is not required to file ITR but it's always better to file ITR. She can file ITR 1.
Please feel free to call/revert in case of any doubts
Thanks and Regards
Abhishek Dugar
CA CS B.Com