Tax & invoicing
NF-e in practice, digital certificates, and tax regimes without the legalese.
Tax
NF-e in practice: issue your first invoice without errors
From the certificate to the authorized XML, the step-by-step guide to issuing NF-e and NFC-e without getting rejected. What each field means and where most people slip up.
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Carlos Tom
May 20, 2026 · 1 min read
Tax
A1 digital certificate: what it is and how to install it
A1 or A3? Where to buy it, how to install it in your ERP, and why it's the key that signs every invoice you issue.
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Carlos Tom
April 30, 2026 · 1 min read
Tax
Simples, Presumido, or MEI: the right tax regime for your store
Your tax regime determines how much tax you pay and how your invoice is issued. A quick map so you can talk to your accountant knowing exactly what's at stake.
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Carlos Tom
April 15, 2026 · 1 min read
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