Hi Sujatha,
The last I looked into Tally was back in June this year. At that time, I had several users who advised that the latest version of their software, Tally Prime, is now completely inaccessible with all screen readers. The previous version, Tally ERP 9.6, apparently worked with Jaws, but not NVDA or other screen readers, but this new version doesn't even work with Jaws I am told, let alone NVDA.
I tried to reach out to them to find out more, and they never bothered replying to me. I suspect the only way you are more likely to get an answer is through whoever manages the contract with them at your work.
I know we have people using other accounting packages such as Xero with more success, although I appreciate that getting a business to change their accounting software is not easy. But if Tally won't reply to anyone, let alone work on accessibility, I can't think of many other options.
Kind regards
Quentin