The four bills aim to reform Nigeria's tax administration system. Here's a breakdown of what each bill proposes:

Joint Revenue Board Establishment Bill: Establishes the Joint Revenue Board, the Tax Appeal Tribunal, and the Office of the Tax Ombudsman to harmonize and coordinate revenue administration in Nigeria.

Nigeria Revenue Service Establishment Bill: Repeals the Federal Inland Revenue Service (Establishment) Act and establishes the Nigeria Revenue Service to oversee revenue collection and accounting 

Revenue Assessment and Collection Bill: Provides for the assessment, collection, and accounting of revenue accruing to the Federation, Federal, States, and Local Governments 

Nigeria Tax Act: Repeals certain Acts on taxation, consolidates legal frameworks, and enacts the Nigeria Tax Act to provide for taxation of income, transactions, and instruments.

Senate Majority Leader Bamidele Opeyemi sponsored the bills, stating that they'll simplify and streamline tax administration, reduce the burden on low-income earners, and eliminate double taxation. However, Senator Ali Ndume raised concerns about the bills' constitutionality and the lack of consultation with stakeholders.