CDS40012At least one of the commodity codes you have declared requires additional information that cannot be provided on this dataset. Please use the standard full export declaration dataset (B1) instead.

HMRC explanation

At least one of the commodity codes you have declared requires additional information that cannot be provided on this dataset. Please use the standard full export declaration dataset (B1) instead.

Source: HMRC, Customs Declaration Service error codes, Open Government Licence v3.0. GOV.UK publication · Licence

What to check across the Domain and value errors

A code or value is not recognised, does not apply to the commodity, conflicts with a tariff measure or condition, or is duplicated. Check the code list for the element, the measures for the commodity code on the UK Trade Tariff, and any preference, unit or document code tied to those measures.

A declaration that clears CDS can still be wrong

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Source: HMRC, Customs Declaration Service error codes, Open Government Licence v3.0. GOV.UK publication · Licence