Maybe I should clarify.
I want a dropdown box for "Province" on the Edit Customer page that populates the BillAddrState field in the Customer table, which would be then hidden. The idea is to implement controls on the data entry for provinces.
It's relatively simple to do this for new customers/accounts. But the issue I have is that there may be existing customers with invalid entries in the BillAddressState field (which is synced to QB).
So, on screen load for the Edit Customer screen, I'd like to populate the "Province" dropdown with a blank entry if the existing BillAddrState entry is not one of ON, QC, AB, etc. The dropdown itself uses these distinct values, but I don't think I can validate the BillAddrState entry versus the dropdown list, can I? Do I need to do it versus a table/ If so, how do I build a selection list from distinct entries in a table?