This function is defined in the sales line table as well as in this report, so when the report calls UpdateAmounts it runs the one in the sales line table rather than the one defined in the report. This has the irritating effect of recalculating GST (VAT, Sales Tax…) just for the report. Normally this isn’t an issue but if you have manually changed any GST amounts it would be good if the report reflected your changes. My fix is to rename the function in the report. Dan.