Do I need to declare foreign income to Receita Federal?

Yes. Foreign income received by an individual (PF) must be reported monthly via carnê-leão, using the PTAX exchange rate on the payment date. It is also included in your annual IRPF declaration under "rendimentos recebidos do exterior." Failing to declare can result in malha fina penalties. If you receive as PJ, income is declared under your company's tax regime instead. Ruvo does not withhold taxes: declaring them is your responsibility. Transactions are reported to the authorities of the countries where they take place.