how much automation are you wanting with this process?
User to press a button to check for missing scheduled transactions?
for all banks or one bank at a time.
you can always fill a list box with all the missing dates for each bank, as the user selects the item pull up a box with allows the user to fill in the missing items using the update query. Then refresh the list box. Until there are no more items.
Again Not sure what you are really trying to accomplish.
in other words..
list box on the left with missing dates in order and banks. as the user selects them you would have blank unbound boxes on the right that would be updated by the user and a button to update the database. in that button once the update process is finished it would blank out the text boxes on the right and refresh the list box on the left.
hope this helps