Open the 
Customer Price
Groups window.
In the Customer Price Groups window, set up a line for each customer price group and fill in the fields. For Help about a specific field, click the field and press F1.
Before you set up customer price groups, you must decide how many groups you want and which customers will belong to each group.
Open the Customer Price
Groups window.
In the Customer Price Groups window, set up a line for each customer price group and fill in the fields. For Help about a specific field, click the field and press F1.
When you set up a customer price group, you can specify that VAT is included in the prices you create for customers belonging to the price group. To do this, insert a code in the VAT Bus. Posting Gr. (Price) field, and then place a check mark in the Price Includes VAT field. (These fields are not included in the standard layout, but you can insert them with the Show Column facility.)
Entering Customer Price Group Codes on Customer Cards