To view the posted Deferred income journals, go to the Quick Launch area on the left-hand side of the iplicit screen, search for and select Deferred income (or use the top bar and select Period end > Deferred income). 

This will show Deferred income journals that have released based on the start date on the invoice up to the current open period. 

The journal details can be viewed by double clicking on the relevant journal line, or using Ctrl and click on the document number: