Dear Experts,
When i run the Project invoice proposal for T&M project.
Although I reselect the Item sales tax group and Sales tax group (See below PIC)

The Item sales tax group and Sales tax group on Invoice journal transactions are still the same with value on Project journal (Project sales tax fields). And cannot reselect the Item sales tax group.
=> My question is: Is MS designed this function this way?
Thank in advance,
Best regards,
Thu