# NFE-527

Source: https://xmlvalid.com/rules/NFE-527

> Rejeição: Operação de Exportação com informação de ICMS incompatível [nItem: …] (CST ……).

- Level: error
- Rule sets: SEFAZ authorisation rules of NF-e 4.00 MOC 7.0 Anexo I, NTs up to 2026.010
- Context: `nfe:infNFe/nfe:det`
- Test: `$c1 != '7' or $fin = '4' or $cst = '41' or $csosn = '300'`

In English: An export CFOP (starting with 7) needs ICMS CST 41 or CSOSN 300, except in returns.

Validate a document against these rules: https://xmlvalid.com/validate