The Leaving Cert online portal reopened today for candidates to review and confirm their written exam choices, accredited grades or both.
It will remain open until 6pm on Friday.
All candidates are required to log on and complete this process even if their choices have not changed since March.
Students who have opted for accredited grades must indicate the subjects they want assessed and select the level they want to be assessed at.
The choice of subject level can be changed on the day for students sitting written exams but levels chosen in accredited grades cannot be revised because the process of assessment gets underway in schools next month.
Students have been advised by their teachers to sit the exams as well as choosing accredited grades.
They will then be awarded whichever of the two is the higher grade.
This is considered the best approach to take in attaining the college course of choice.
The demand for popular courses has surged with EU students applying to study in Ireland as a favoured English speaking country.
Leaving Cert candidates are hoping that the papers will reflect changes and readjustments with somewhat easier papers.
However, the points race is expected to increase significantly and the advice is to sit the exams as well as opting for accredited grades to achieve the best possible outcome.
A working group was set up by Minister Simon Harris to identify the availability of up to 3,000 extra third level college places to cope with demand. It is expected to report back in the coming weeks.
For students who didn't register in March, a 'Before you Start’ guide is available on the Government website.