To cite package ‘irpfR’ in publications use:

  Braga de Oliveira L (2026). _irpfR: Access to the Great Numbers of
  Brazilian Individual Income Tax (IRPF)_. R package version 0.1.1,
  <https://github.com/luabragadeoliveira/irpfr>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {irpfR: Access to the Great Numbers of Brazilian Individual Income Tax
(IRPF)},
    author = {Luã {Braga de Oliveira}},
    year = {2026},
    note = {R package version 0.1.1},
    url = {https://github.com/luabragadeoliveira/irpfr},
  }