(VAT organizations only) If you entered product and event pricing in iMIS 15.2.5 and earlier, it was exclusive of VAT. If you now enable VAT Inclusive pricing, you need to do a one-time conversion of your existing pricing to include the VAT tax amount.
See Configuring VAT options in AR/Cash. When you enable the option in AR/Cash, iMIS prompts you to run this conversion.
Caution: Always back up your database and ensure that you can restore it before running any data conversion.
Upgrade note for VAT: Now that iMIS stores all order and order line amounts as VAT-inclusive, DB Upgrader takes care of updating all of your existing order data to be consistent with your new order data. Flags on the record ensure that the update occurs only once, and your original data is backed up (Orders_BAK and Order_Lines_BAK). Note that this universal change to storing order amounts as VAT-inclusive is unrelated to whether you set AR/Cash VAT Options to be VAT Exclusive.