Supplier's Invoice is in GBP and payment is in EUR

Thanks for sharing the details of your concern with us, @karteekcacma. I'd be glad to show you how to properly handle payments in different currencies in QuickBooks Online (QBO).

The option to match invoices and payments in different currencies is unavailable. What we can do is record them manually.

Here's how you can proceed if you paid the bill with a credit card or cash:

1. Select + New. then choose Pay Bills.
2. This shows all outstanding bills you've entered into QuickBooks, including their balances and due dates.
3. Select Filter to change the date range or a specific payee.
4. From the Payment account dropdown, select the account you paid the bill from.
5. If you select a current or savings account, you can enter the Reference no. This is optional.
6. Enter the Payment date then select the checkboxes for the bills you made a payment towards.
7. In the Payment column, enter the amount you paid for each bill.
8. When you're done, select the Schedule payments online ▼ dropdown. Then select Save, or Save and close. Or select Schedule payments online to learn about available payment processing options.

Moreover, if you paid for the bill with a cheque, feel free to visit this article: Enter bills and record bill payments in QuickBooks Online. It contains the detailed steps you need to perform and also has the steps I've provided above.

If everything's good with your transactions, you can now proceed with reconciling an account in QBO.

Please let me know if you have additional questions about reconciling accounts in QBO. I'll be around to help. Have a good one!