You're required to validate your registered candidates and to do so, you need to print out the Validation Card, Validation, Entry Schedule, and Subject Analysis after you must have captured your candidates' bio-data. See the steps below to proceed:
At the top-right of your candidates’ list page, you’ll see the “Print Report” column.
Hover your cursor over it and you’ll see three options as follows: Print validation card, Print validation list, Print Entry Schedule, and Print Subject Analysis.
Go ahead and click each one after the other to print out each one of the lists.
(See the image below for a description)
NB: You have to select all your registered candidates in order to be able to print out their lists. You can select all candidates at once by clicking on the "check all" button which can be seen on the dropdown as shown below: 
Find below the sample for the Validation card, Validation list, Entry Schedule, and Subject Analysis:
Validation Card:
Validation list:
Entry Schedule:
Subject Analysis:
Take all printed copies to your nearest NECO office for candidate validation.