The Department of Education has said that some students received incorrect grades when their Leaving Cert calculated grades were issued earlier this month.
Minister for Education Norma Foley has said her "priority is to fix the errors and their consequences so that students get their correct grades", and a series of independent checks are now said to be under way.
An estimated 6,500 students are set to receive higher grades, but no student will be marked down.
The department has said it believes that the majority of those impacted will get an improved grade in only one subject, while a small number of students will see upgrades in more than one.
So if you're a student wondering what happens now, here is a quick look at the next steps.
How will I know if I'm affected?
The Department of Education and Skills is due to make contact with the students who have been affected by these grading errors.
The department has said those students will be receiving their improved grades "as soon as all the checks are completed".
How will this impact college places?
The first step will be to issue the revised grades and at that point the CAO and the Higher Education Institutions must determine which of the affected students are eligible for a higher preference offer.
The CAO, the Higher Education Institutions, and the Department of Further and Higher Education will have to decide on how any student who has received upgraded results "can be facilitated to commence the course" they would otherwise have been offered in an earlier CAO round.
The department said it will "send a corrected file of student results to the CAO so that the CAO can work with higher education institutions to determine if a student is due a new offer and to do everything possible to facilitate their admission.
"Any student who would have been entitled to a different offer in previous CAO rounds if they received the correct grade on 7 September will receive this offer or a deferred offer as soon as practicable after the updating of results."
Might other errors emerge?
The Minister for Education said her department has commissioned "international experts" to examine aspects of the calculated grades system.
Norma Foley said the coding errors at the centre of this issue have now been corrected.
She said a series of further checks has been carried out "and has identified no further errors in the coding".
When will the outcome be known?
A US-based non-profit organisation that specialises in educational measurement, called ETS Educational Testing Service, has been contracted to review "aspects of the coding".
That review is expected to take a number of days and at that point the full information on which students will benefit from the improved grades and the specific subjects involved for each student will be known.
It is at that point that all students will be contacted, "advising whether they will receive a higher grade or grades, or that they are not impacted".
Can I talk to someone about this?
The department has said a helpline has been established along with a dedicated email address to answer queries from students.
The helpline number is 01 8892199 and the email address is LC2020@education.gov.ie.
The helpline will be open today up to 7pm and tomorrow, Thursday, from 10am-5pm.