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Your Own ERP for a Brazilian SMB
NF-e, taxes, reconciliation and boletos
What really breaks when a small Brazilian business builds its own ERP: NF-e rejections, state registration, ICMS-ST, duplicate invoices, DF-e, the tax reform and bank reconciliation.What really breaks when a small Brazilian business builds its own ERP: NF-e rejections, state registration, ICMS-ST, duplicate invoices, DF-e, the tax reform and bank reconciliation.
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About
About the Book
Issuing electronic invoices in Brazil is where homemade ERPs fail first. This guide documents what broke in a real in-house ERP: the SEFAZ rejections you will see and what causes them, the state registration (IE) problem, ICMS-ST without guesswork, duplicate and cancelled invoices, dirty master data that blocks an invoice, received-invoice (DF-e) flows, what the tax reform means for a fiscal module, boleto, Pix and reconciliation, and the night you switch from homologation to production. Tax rules change: where the text depends on current legislation it says so and tells you to confirm with your accountant. Parts of the finance chapter come from research and are marked as not verified in production. For small-business owners and developers who build or integrate fiscal and financial systems in Brazil. 11 pages, PDF.
Author
About the Author
Leandro Salerno
Leandro Salerno leads marketing and technology at Austhen, a Brazilian industrial audio group with 20+ years of engineering, behind the brands Sansara, IBS and Xcene.
He didn't learn AEO from a course — he learned it shipping real sites: building and optimizing the group's B2B catalogs in Next.js and Firebase, and fighting every indexation and schema bug documented in this book. After getting those sites cited by ChatGPT and Perplexity, he packaged the method into AEO in Practice.
He writes for developers and agencies who want to master the next layer of search before the competition does.
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