You might be asking of the date that you are allowed to do Reprinting of slip, please read on to know the date of Reprinting.

According to the popular sources, all candidates were expected to reprint their registration slips to know the details of their exam as from April 25th, 2017/2018. The 2018 Date of Reprinting shall be made known

For those JAMB candidates sitting for Mock Examination, the reprinting date will be out by this month. It all depends on when the Mock Exam date will be released.

We expect JAMB to know that email delivery may be unreliable, so they should make adequate arrangements quickly to ensure that candidates are able to reprint their exam slips directly from their profile on the JAMB portal. When this is available, we will let you know on this website.

On the steps to Reprint your JAMB UTME Exam Slip..

Source: http://wakagist.com/jamb-2018-when-is-jamb-reprinting-starting-date/