Ah... got it! It's 0.0% ECS, which no longer populates Box 8, but does populate Box 6, which is correct. Thanks!

I think I have worked it out! I am trying to enter a sales invoice for consultancy services to an EU VAT registered customer (B2B). Before 1/1/21 you had to use...

Cleared cookies and cache, still not showing. It's "On" in the dropdown list from "Edit VAT" in Taxes, but it is not showing in the "Manage rates" wheel icon in...