Filter Does Not Display ID

[David]

Hello,

I have a form with a tab control on it.

The first tab has Customer First Name and Customer Last Name.
The header has Customer ID.

Another tab has 4 subforms on it, each of which use a query as the
datasource. Each query references the Customer ID on the header of the form.

When I try to use the FILTER function to filter by name, the records which
match the name are returned, but the Customer ID does not display. As such,
I get a pop up for each of the subforms/queries, asking for the Customer ID.

Any ideas what I need to do to have the Customer ID display?

Thanks.