The Finance Bill has passed all stages in the Dáil, paving the way for a general election.
It passed by a margin of 75 to 55 on Tuesday night.
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The Dáil is set to be dissolved at the end of the week, as the Finance Bill was a key piece of legislation to be dealt with before the dissolution.
The Appropriations Bills, the Family Courts Bill, the Public Health (Tobacco) Amendment Bill and the Companies (Corporate Governance, Enforcement and Regulatory Provisions) Bill were also scheduled for Tuesday and Wednesday.
A light Dáil schedule for Thursday has prompted speculation that this is the day Mr Harris will go to Áras an Uachtaráin to ask President Michael D Higgins to dissolve the Dáil.