CDS40045Missing document

HMRC explanation

A document is missing
The licence or exemption required for these goods is missing. You need to check the 'Conditions' box for the commodity code on the Trade Tariff. If you do not hold any licence, you must decide if you can declare a waiver (usually a Y-code). Instructions for how to use the code are given in the 'Conditions' box for the commodity code and Appendix 5A.

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.

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