Hello, Sixey_23.
I understand you require assistance in determining which VAT code to use for a non-VAT registered supplier. I'll route you to the best support to help you with this.
We can't recommend a VAT code to use in the Community space. I suggest consulting your tax adviser or tax agency to ensure you have the correct VAT.
Once you have all the details, you can read the following articles below to give you more insights about adding VAT rate to the system:
In addition, I've included this resource about filing and paying your taxes for future reference: File and pay Tax/GST.
Let me know if you need further assistance with the VAT code. We're always here to help you.