Hi @David Foster 

I don't use Stripe but I'm guessing they're VAT registered in Ireland or Luxembourg (not for tax avoidance purposes of course but because they need access to fresh Guinness or whatever it is Luxembourg produces)?

& your bill from them shows zero VAT but probably mentions Reverse Charge for Services?

Use QB VAT Code 20.0% RCSG.

There is no extra to pay, this codes adds/removes from each side.

(before the B-word, you would have used the corresponding EC VAT code)

Hope this helps.