First of all, it is important to clarify that, with formalizing the Definitive Exit, your Tax ID (CPF) number will not be automatically cancelled. In addition, it will not prevent you from having real estate properties and corporate participation in Brazilian companies.
However, there will be other consequences, such as the impossibility of adopting the SIMPLES Nacional regime through the companies in which you are a partner. Another example is the impossibility of continue to manage these companies, as well as not being able to use the Reduction Factor for the purposes of Capital Gains calculations.
The Statement of Definitive Exit may also restrict the financial investment portfolio in Brazil, almost limiting said portfolio to investing in some funds, CDBs and Private Pension Funds.
In other words: you must be cautious, you must know all the consequences and plan this step very well ahead of time.