Adding and updating VAT Tax Groups:
Tax rates can change and new rates added. This is fully handled by MTD for Accounting Seed. You will be send a new upgrade URL which add the details of the tax changes to Salesforce. Then you need to add the Tax Groups:
1. Upgrade the Managed Package
Use this URL to upgrade the Managed Package, or get in contract to make sure this is the most up-to-date version:
2. Add the new Tax Groups
Navigate to the latest VAT Return and click the [VAT Return] button (top right).