warning while changing sales tax group value of purchase requisition line details in ax 2012

Have you looked in LCS? If you can’t find one log it with Microsoft and get one as suggested.

I couldnt find the same error in LCS, what can be done further, Please can you suggest.

Thanks in advance

Try searching using that class method.
For reference see, docs.microsoft.com/…/issue-search-lcs

You log it with Microsoft, they provide a hotfix if they agree

Searched in that way too, but no result found for that class and method.

Can you provide steps for asking Microsoft, I need some help to proceed to microsoft regarding this issue.

Thanks in advance,
Gopinath

So from within LCS against the project you searched for the hotfix you would log a support issue, it is one of the options next to the issue search.