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NFE-591

Rejeição: Informado CSOSN para emissor que não é do Simples Nacional (CRT diferente de 1 ou 4) [nItem: …] (CRT …, CSOSN …).

In English An issuer outside the Simples Nacional (CRT other than 1 and 4) gives a CSOSN.

error: the document is invalid

What the rule checks

As the rule set's publisher wrote it. The rule runs on every element the context matches, and fails where the test is false; the validator reports the line of that element.

SEFAZ authorisation rules of NF-e 4.00 MOC 7.0 Anexo I, NTs up to 2026.010
Context
nfe:infNFe/nfe:det
Test
$crt = ('1', '4') or not($csosn)

Checked with NF-e 4.00, NF-e 4.00 with authorisation protocol