The portal is open since 9 o'clock this morning.
Leaving Cert students wishing to do the written exam in November can now register to sit it.
The State Examinations Commission says it can be accessed on the Calculated Grades Student Portal.
Students have until 5pm on Friday to apply to sit the written exams, which will run from Monday the 16th of November to Friday the 11th of December.
Guidance Counsellor in Colaiste Mhuire CBS Mullingar Betty McLaughlin says they will take place outside of school hours:
Calls Made For Greater Police Presence In Offaly Town
Quarter Of Residents In Laois IPAS Centre Granted Permission To Stay In Ireland
Man Arrested After Attack On Offaly Garda Station
Gardaí Investigating Criminal Damage At Midlands Pharmacy
Midlands County Hosts Water Safety Awards Ceremony
Surge In Respiratory Illness Cases Forces Visiting Restrictions For Midlands Hospital
Midlands MEP Warns Of EU Meat Price Collapse Ahead Of Mercosur Protest
Offaly TDs Raise Community Policing Concerns Following Arson Attack
Fianna Fáil Warns Ireland Must Stay Competitive Amid Minimum Wage Increase
Uisce Eireann Confirms Completion Of Offaly Works
Man Hospitalised With Serious Injuries Following Offaly Crash
Biodiversity Children's Book Launches In Midlands
Over €3.8m In IT And Minor Works Grants Going To Midlands Schools
Midlands Property Prices Continuing To Rise
Mercosur Vote Down To The Wire - Midlands MEP
Offaly Community Sports Facility To Remain Closed Over Christmas
Westmeath Security Expert Welcomes Gardai Training For EU Presidency
Lower Childcare Fee Caps Could Lead To Closures - FECP
Gardai Investigating Potentially Suspicious Approach Of Child In Laois
Midlands Animal Rescue Shelter Unequivocally Against Fox Hunting