What do you mean by "the pension"?
Contributory (PRSI linked) or non-contributory (means tested)?
The State Pension (Contributory), previously called the Old Age (Contributory) Pension, is payable to people aged 66 and over who have worked and paid enough social insurance contributions.
www.citizensinformation.ie
The State Pension (Non-Contributory) previously called the Old Age Non-Contributory Pension is a means-tested payment available to people in Ireland aged 66 and over.
www.citizensinformation.ie
What is the status of the tax and PRSI arrears and what, if anything, have Revenue and the Department of Social Protection respectively said to you about them and dealing with them?