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Income taxes (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Taxes |  |  |
Income before income taxes | R$ 429,582 | R$ 428,433 | R$ 273,462
Combined statutory income taxes rate - % | 34.00% | 34.00% | 34.00%
Income taxes at statutory rates | R$ (146,058) | R$ (145,667) | R$ (92,977)
Reconciliation adjustments: |  |  |
Tax effect on loss from entities not subject to taxation | (32,274) | (32,859) | (37,794)
PROUNI - Fiscal Incentive (i) | 309,952 | 270,062 | 194,830
Unrecognized deferred tax assets | (154,062) | (117,377) | (86,233)
Recognized deferred tax assets | 3,233 |  |
Presumed profit income tax regime effect (ii) | (8,787) | (1,549) | (7,066)
Permanent adjustments | (4,687) | (12,226) | (6,232)
Other | 8,517 | 3,939 | 4,293
Income taxes expense - current | R$ (24,166) | R$ (35,677) | R$ (31,179)
Effective rate | 5.62% | 8.33% | 11.40%

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