Thanks for the replies!

Maria: I don't know what are you trying to tell. The invoice will be created in the currency in which the customer is set to pay. So when I add the customer and I add USD and his/her payment settings, the invoice will be generated in USD....

Xavier: I see that you started this thread, and I'm glad that the ticking the VAT summary to display is solved your problems. However for me in the VAT summary only USD details appear. I can't see your image -virus scanning in progress.....(what kind of glitch is this?)-. I asked another quickbooks team member and she sent me an invoice where the VAT details appear both in USD and GBP.  ( see picture). I don't know what else should I change in settings in order to display VAT details in the home currency.

Maybe, I should turn on "Making tax Digital"?

Thx in advance.