There is a "Tax Roll Down" utility that has been available that changes the behavior of how tax schedule changes are handled in a SOP transaction. I cannot determine if this utility has been or will be updated to GP 2018, as this is functionality we require and we are in the update process. It is not clear to us why the function in that utility would not be available in GP. Therefore we ask that the behavior of sales taxes in SOP be enhanced to include the functions in that utility. This may require selecting options in SOP Setup to enable the feature. See: TechKnowledge Document ID:34567