Thanks for the formula. It got me the information I need--except I checked the total against the total in the OE Tax Summary report and it is not the same. I believe it is because Gridview did not pick up the credit notes (as the total tax shown on the GV report is over by double the amount of the tax on the credit notes (give or take a few $)). Is there somewhere on GV where I can add this field(s) to the report?