Modifying transaction codes for a tax group Before you can modify a transaction code, you must add the transaction code to the tax group. To modify the transaction codes: Select Administration > Property > Taxes > Tax Groups. On the List View tab, double click the tax group that you want to modify. Click Transaction Codes tab. Select the transaction code that you want to modify. Specify the values in the Transaction Code Details section. Optionally, specify the values in the Condition Base Details section. Note: You can calculate: Gross Rate Range for each person, for Germany Amount Tax Base for each person, for France To save the record, click the Save button.