Go into the Vehicle Module and select Vehicle Parameters.

Within Vehicle Parameters select Accessories. 

You can either select a page that already exists or create a new page.

To create a new page select "Add Page" - and enter the required description. 

To add an Accessory - select the required page and then select "Add Accessory". The window that displays will look similar to the below: 

Enter the required Retail and VAT status for the accessory line.

You can also tag a nominal code to the accessory, which will go through separate to dealer options.

On completion, select Update.