Click on 990EZ in the Finance section
Clicking on the 990EZ Form will bring up the various 990EZ line amounts on the actual 990EZ Form. You need to associate 990EZ code to a account in the Chart of Accounts.
The Amount on Line 21 needs match Line 27 B. If it does not that means all your Account Categories which have transactions are not associated with the 990EZ Line codes.