I am really disappointed with the Solution.
Same line item is levied with multiple tax - IGST and Cess.

Your support staff was unable to understand this and sent me this link. I tried to tell him that this solution will not help. But he still made me to follow the steps mentioned. and in the last he was silent.
I have 5 clients facing similar issues, but no update from QB team. They all might shift to other software very soon.