I use Stripe for collecting both GBP and EUR payments and have a merchant bank account for each currency in QuickFile. Every month Stipe issues an invoice for their fees which displays both the GBP and EUR fees on a single monthly invoice.
How do I tag this invoice to two outgoing transactions, one in Stripe GBP and one in Stripe EUR account?
If the invoice is in 2 different currencies (EUR and GBP), then you would need to enter this as 2 separate invoices each in their own currency. Unfortunately it’s not possible to enter an invoice is more than 1 currency.