You need to check and/or upload HTS ( Commodity Codes) MID Codes ( Manufacturer Identity Code) and/or Intrastat Code
HTS Codes are added to a Product via the Customs Tab to indicate the customs classification of a product and the duty rate required for importing the product into the US
To find HTS Codes - see the link below
If you enter the HTS code when you first create a product, it will stay there when you copy the product in order to create a new colourway
INTRASTAT Codes are added to a Product via the Customs Tab to indicate the customs classification of a product and the duty rate required for importing the product into the EU
To find Intrastat codes - see link below
Click here to access UK Intrastat code website
This link is for UK site - if you are EU client please review your own government Tariff Code site.
If you need to update the MID CODE for manufacturers, this should be done from MANUFACTURER record - read this