To create or modify a Price List, click on Price List from the Application Menu.

Enter the Name of the Price List and a Description. You also need to select the Currency.
Select a Price Precision. This is used to determine the number of decimal places that will be used when calculating a Price. This may be different than the Currency Precision defined for the selected currency. You may want to have a Price Precision greater than the Currency Precision if you sell products that are a low price (e.g. 1/2 cent) and generally sold in 100's or 1000's. Regardless of the Price Precision, the Order or Invoice line will always be rounded to the Currency Precision.
Select the Price includes Tax check box to indicate if the prices include tax. This is also known as the Gross Price. When an Order or Invoice is Processed, it will calculate what portion of the price is the tax based on the tax rate for the line.
Select the Enforce price limit check box to indicate that prices cannot be below the Limit Price. If a User has a Role that allows for overwriting the Limit Price, then a price may be entered on an Order or Invoice that is less than then Limit Price.
You need to save your Price List before switching to the Version tab.
Click on the Version tab to enter the Version information for the Price List.
Select a Discount Schema, and a Base Version if you like. If a Base Version is selected then the prices, on that price list will be used for calculating your new price list. If no Base Version is entered, then the price list will be calculated based on the List Price and PO Price on the Product. The Valid from field defaults to the current date.