The 57th Legislature of National Congress is the current meeting of the legislative branch of the Federal Government of Brazil, composed by the Federal Senate and the Chamber of Deputies. It convened in Brasília on 1 February 2023, a month after the inauguration of the winner of the 2022 presidential election.

In the 2022 elections, the Liberal Party became the largest party in the Chamber with 99 deputies and in the Senate with 13 senators.^{[1][lower-alpha 1]}

• 1 February 2023: Congress convened. Members-elect of the Federal Senate and the Chamber of Deputies are sworn in. Election for the Directors' Board of the Chamber of Deputies and Senate. Senator Rodrigo Pacheco (PSD-MG) was re-elected Senate President and Congressman Arthur Lira (PP-AL) was re-elected Chamber President.^[2][3]
• 2 February 2023: Joint session of the National Congress to officially inaugurate the 57th Legislature.^[4]
• 23 May 2023: The Chamber passes 372-108 the Taxes Framework plan (PLP 93/2023) presented by the Ministry of Finances to partially replace the Constitutional Amendment of the Public Expenditure Cap.^[5]
• 30 May 2023: The Chamber passes 311-137 the new Temporal Landmark (PL 490/2007), which forbids new indigenous land registration after 5 October 1988 and new land demarcation must be analyzed by the Congress.^[6][7]
• 21 June 2023: The Senate approves the nomination of Cristiano Zanin for the Supreme Federal Court in a voting of 58–18.^[8]
• 6 July 2023: The Chamber passes 382-118, in a first round, and 375-113, in a second round, the Tax Reform plan (PEC 45/2019), which merges most of taxes over consumption into a value added tax.^[9][10]
• 21 June 2023: The Senate passes, with changes, the Taxes Framework plan (PLP 93/2023), in a voting of 57-17. The bill later returned to the Chamber for a last review.^[11]
• 22 August 2023: The Chamber approves the last review of the Taxes Framework plan (PLP 93/2023) in a voting of 379-64.^[12]
• 27 September 2023: The Senate passes 43–21 the new Temporal Landmark (PL 490/2007).^[13]
• 10 October 2023: The Chamber passes 312-0 a motion of disavowal to the Hamas attacks against Israel (REQ 3458/2023).^[14]
• 18 October 2023: The Chamber passes 323-98 a bill to authorize the membership of Bolivia in Mercosur (PDC 745/2017).^[15] The 8 January CPMI approves 20-11 the final report, which requests a formal complaint against more than 60 people, including former president Jair Bolsonaro, his aide-de-camp Mauro Cid, former ministers Walter Braga Netto, Anderson Torres, Augusto Heleno, Luiz Eduardo Ramos, Paulo Sérgio Nogueira, former Navy Commander Almir Garnier Santos and former Army Commander Marco Antônio Freire Gomes.^[16]
• 20 October 2023: President Lula da Silva vetoes most of the Temporal Landmark (PL 490/2007), turning the rest of the bill into Law 14701/23.^[17]
• 25 October 2023: The Chamber passes 323-119 a bill to tax offshore assets and high income funds (PL 5173/23).^[18]
• 8 November 2023: The Senate passes 53-24, with changes, the Tax Reform plan (PEC 45/2019). The bill later returned to the Chamber for a last review.^[19]
• 22 November 2023: The Senate passes 52-18, in two rounds, a constitutional ammendment to limit the powers of the Supreme Federal Court (PEC 8/2021).^[20]
• 27 November 2023: President Lula nominates Justice Minister Flávio Dino for Justice of the Supreme Court and Paulo Gonet for Prosecutor General.^[21]
• 13 December 2023: The Senate approves 47-31 the nomination of Flávio Dino for the Supreme Federal Court and 65-11 the nomination of Paulo Gonet for Prosecutor General.^[22]
• 5 February 2024: Congress convened for the opening of the 2nd session of the 57th Legislature. A message sent by president Lula was read by Congress First Secretary Luciano Bivar.^[23][24]
• 24 March 2024: Congressman Chiquinho Brazão (UNIÃO-RJ), along with his brother, Domingos Brazão, and former chief of Rio de Janeiro Civil Police, Rivaldo Barbosa, is arrested for ordering the assassination of councillor Marielle Franco.^[25]
• 10 April 2024: The Chamber approves 277-129 a resolution to keep congressman Chiquinho Brasão (Ind.-RJ) arrested (CMC 1/2024, converted into Resolution 9/2024).^[26]
• 16 April 2024: The Senate passes 53-9 a constitutional ammendment to prohibit the possession and carrying of any amount of drugs (PEC 45/2023).^[27]