Recommendations on recovering millions of pounds in unpaid taxes from some of the main financial institutions are expected today in the Dail Public Accounts Committee (PAC) report into DIRT evasion.
It is understood this could be by way of a special levy on the banks.
The report, which sources said last night would "pull no punches", follows a seven-week public hearing into DIRT (Deposit Interest Retention Tax) evasion in the 1980s and 1990s conducted by a six-member committee chaired by Mr Jim Mitchell.
One source last night described the report as "explosive".
The sub-committee met every weekend for the last four weeks, including last Sunday, in order to fulfil its pledge to have the report published Christmas.
The inquiry was set up last year following the leaking of an internal bank document which suggested AIB had potential DIRT liabilities of £100 million.
The hearings sought to establish whether AIB had, as it claimed, secured an amnesty from the Revenue Commissioners in relation to DIRT liabilities on bogus non-resident accounts.
The report is also expected to include recommendations on a formal annual review on problems with the application of certain taxes.
There was also speculation that there would be a recommendation that auditors make regular reports on tax compliance to the Central Bank.
The committee is expected to have looked in particular at the role of the Revenue Commissioners in collecting DIRT between 1986 and 1998 and to have examined ways of making the Revenue Commissioners a more efficient and professional body.
The report has taken more than two months to compile and runs to seven volumes. Two of the volumes comprise documents disclosed to the hearings. Four of the volumes are made up of transcripts, while the seventh volume, of over 200 pages, contains the committee's findings.
This key volume is divided into eight chapters, each with a summary and findings attached. One chapter is devoted to the background to the hearings, another deals with the Central Bank, the Revenue Commissioners, the Minister for Finance and the Department of Finance, while another deals with financial institutions.
There is also a chapter on governance and ethics in the banking sector and a chapter on the role of the Oireachtas in this type of hearing.
During the seven weeks of public hearings, AIB insisted its officials had brokered a deal with the Revenue Commissioners, which cancelled any DIRT arrears for 1986 to 1991.
The committee examined witnesses from the major financial institutions, the Revenue Commissioners, the Central Bank, the Department of Finance and politicians.
It heard evidence from 142 witnesses and examined 150,000 pages of documents. The hearings were based on a report by the Comptroller and Auditor General's office commissioned by the committee.
The report will be formally approved by the Public Accounts Committee this morning and will be placed in the Oireachtas library.
There has been much praise for the handling of the investigation by Mr Mitchell and the efficiency of the committee's public hearings which were broadcast live on television attracting an unexpectedly large daily audience.
The hearings were said to have greatly enhanced the reputation of the Dail committee system compared to the much longer and more costly tribunals of inquiry which have been dominated by lawyers.
Along with Fine Gael's Mr Mitchell in the chair, the committee, in fact a sub-committee of the Public Accounts Committee, comprised Mr Sean Ardagh, Mr Sean Doherty and Mr Denis Foley of Fianna Fail; Mr Bernard Durkan of Fine Gael and Mr Pat Rabbitte, Labour.
Even before it started its work, the committee had the advantage of the exhaustive report on DIRT evasion and bogus non-resident accounts by the Comptroller and Auditor General, Mr John Purcell.