Level 13

Transactions

If your home currency in GBP, you have to turn the multi-currency feature on, create your Euro bank account, and create a new customer/vendor with currency of Euro    

 https://quickbooks.intuit.com/learn-support/en-uk/help-articles/does-quickbooks-online-support-multi...

 

If you don't want to turn the feature on nor have any Euro bank account yet, consider to utilize the payment service as I have mentioned earlier. It suports QBO.

 

Hope it helps.