The predefined mask for zip or postal codes in Custom Labels has no format for Canada.
To limit the way you enter zip codes in Employee, Project, Client, and Vendor screens, a new mask must be created and selected in Custom Labels.
1. Navigate to Settings> Custom Labels in BillQuick.
2. Expand the Project list.
3. Select Zip.
4. Towards the bottom of the screen in the mask’s Field Type, enter ?9?-9?9. (This enables you to enter zip codes in the proper 6-digit Canadian format.)
5. You will see a prompt that asks if you would like this to apply to all fields, click yes if you would like to have all other screens with a zip code field to use this format.