In C&D goto Settings, Trading Names. Setup a new Trading name called ‘IOSS Amazon’. Enter all the details (your name, address, VAT number, etc). Then drop down the menu that reads ‘Pre-registration tax schemes & IOSS’, add in IOSS (EU) then beside it enter the number IM4420001201 which is the Amazon IOSS number.

In C&D, goto Settings, Default Customs Information. Enter default settings and click the tick box ‘Automatically sign and date customs documents’. You can then upload a jpg of your signature so you dont have to physically sign them afterwards.

All your items in your inventory will require a HS Code. There are tools to help you find the code but tbh they are not much use. Instead try to get the HS Code from your suppliers (much easier)

As you sell items and need to dispatch Internationally. C&D will need the HS code entering. It will remember the code so this only needs to be done once per product on the first international shipment.

Select the correct international service (please note not all are IOSS compatible so make sure you are using correct one) - I think International Tracked & Signed is MTE but check.

When you print your labels, C&D will now print the customs form for you. Attach both to parcel and bag your parcels accordingly to whatever you have been told (usually different services and zones require different bags)