There are multiple definitions - click on the translation that matches your context.

Cadastro Nacional da Pessoa Jurídica (CNPJ)

substantivo próprio

partial

tax number

noun

Comparative law notes

Portugal

In Brazil, the identification number that is used by the state for tax and other identification purposes with respect to companies is the Cadastro Nacional da Pessoa Jurídica (CNPJ).

Definitions of tax number

English

an identification number issued by a tax authority. Different authorities have different terms for this, for example the US Internal Revenue Service (IRS) issues US taxpayers with a Taxpayer Identification Number (TIN)

If everything goes according to plan you will be instructed to go to the local tax office to obtain a tax number.