Yes, the best way to address this would be to re-file the return with the boxes filled in correctly. 

As a representative, log into the Represent-a-client web portal to verify that the submitted return has been assessed.  As long as it is already assessed, you should be able to immediately re-file the correction.  If there is a delay in it being assessed ie:  selected for pre-assessment review, then you should wait until it has been assessed before submitting the re-file with the correction.

Hope this helps.