Customs may require additional quantities information based on the tariff. The Invoice Overview screen will indicate where additional information is required.
Use the 
button in Update mode in the Lines tab to enter the values directly into the Customs Qty column against each invoice line
Or click on the toolbar button 
and complete the final column in the window.
If a Quantity Factor was entered for the Part when it was classified or in the Parts Masterfile the Quantity Factor will be used to automatically calculate the Customs Quantity
Customs Quantity = Invoice Part Amount x Quantity Factor
This calculated value can be amended in this screen.
Expedient can calculate the Quantity Factor from the Enter Customs Quantity
Quantity Factor = Customs Quantity / Quantity
On OK in the Customs Quantity screen Expedient can save the Quantity Factor to the Parts Masterfile, if a Quantity Factor does not already exist, to be used when the Part appears on a new Supplier Invoice.
If your site would like this ability please send a request through Support Tracker.
You can quickly default all the Customs Quantities values to match Invoice Quantities using the Default Unspecified Customs Quantities option.