Once a CPF has been issued to you, you have to do a tax declaration every year (except the year you've received the CPF). There are two options of declaration:
Declaração de Imposto de Renda (If you earn R$ 12,696 - US$ 4, 095 per year or more)
Declaração de Isento de Impostos (If you don't have income in Brazil or it's less than R$ 12,969 per year) .
Such declarações can be made by your attorney, CPA or by yourself via Internet on the homepage of the Receita Federal (www.receita.fazenda.gov.br). The Declaração de Imposto de Renda is usually done in March and April and the Declaração de Isento de Impostos, in October and November.
Careful is required when filling out the forms, as the information provided can cause legal consequences. This informative has not the intention to serve as legal advise on how to do yourself, it is merely explanatory, please always consult with a professional.
If you don't do any of these two declarations for two years the CPF will be cancelled. In fact the CPF will turn "inactive", to re-activate the CPF you have to go to the nearest office of the Receita Federal and justify why you did not do the declaration. After paying a fee the CPF will be re-activated.
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