How can I apply payments received in USD to invoices issued in EUR, where can I find the option that allows me to use for example USD bank to customers registered in EUR?

We appreciate you reaching out to the Community, Sebastian.

To apply payments received in USD to invoices issued in EUR in QuickBooks Online (QBO), we need to use the multicurrency feature. I'd be happy to guide you through the process with detailed steps.

To enable multicurrency in QBO, please follow these steps:

1. Click the Gear icon and select Account and Settings.
2. Go to the Advanced tab.
3. In the Currency section, turn on the Multicurrency feature and confirm your home currency.

By default, the currency of the invoice is based on the currency specified in the customer's profile. For new UK customers, we can assign EUR currency so their invoice is in EUR. See the attached image for reference:

Furthermore, when recording a payment for a foreign currency invoice, we can only use the home currency bank account. I suggest creating a dummy account in the home currency to simplify transactions between two different foreign currencies.

To create a dummy bank account, here's how:

1. Go to the Gear icon, then select Chart of Accounts
2. Select New.
3. Under the Account Type column, choose Cash and Cash equivalent. Under the Detail Type column, pick Cash on hand. And under the Name column, type in Dummy Bank
4. Before saving and closing, ensure that it's set to your home currency (for example Euro or your home currency).

Here are the steps to receive the payment:

1. Go to the + New button and select Receive Payment.
2. Choose the customer and the invoice in EUR.
3. Set the Deposit to field to the Dummy Bank.
4. Enter the payment amount in USD and save the transaction.

Once completed, you should transfer the funds from the Dummy Bank to the EUR bank account using a bank transfer.

By following these steps, you can manage payments received in USD for invoices issued in EUR, ensuring your reports reflect the correct amounts and currencies.

In addition, you may refer to this article to customise any financial report generated in QuickBooks: Customise Report in QuickBooks Online.

If you have further questions about managing currencies in QuickBooks Online, please feel free to reach out. I'll be here to help. Have a pleasant day!