It depends on how the form's set up.
If the various tabs simply refer to fields in the form's RecordSource, you
can requery the form:
Me.Requery.
If the tabs are actually subforms, you'd have to requery the appropriate
tabs:
Me!NameOfSubformControl.Form.Requery
Note that depending on how the subform is added, the name of the subform
control may be different than the name of the form being used as a subform.