...
Update all pre-invoices in your org to match the new VAT setting to invoices with an invoice date after the valid from date of your new VAT setting
Please Note: the VAT as displayed on the Media Campaign and Campaign Items will still respond to the earlier VAT level but all invoices and invoice items will display the correct VAT values and calculations.
Option 2: Keep existing Media Campaigns
Enter the Commercial Optimizer
Copy existing Campaign Items
Change the Until (date) of your items to the valid to date of your current VAT setting
Change the From (date) of the other items to the valid from date of your new VAT setting
Press save and activate your optimizing version; or Change and clone your Campaign Items directly
Where your items are already fully or partially invoiced, using the Commercial Optimizer is advised
Update all pre-invoices in order to remove old pre-invoices and create new pre-invoices. This will match the new VAT setting to invoices with an invoice date after the valid from date of your new VAT setting
...
If you have any additional questions or require any assistance please do not hesitate to reach out your account executive or simply email support@advendio.com.