The efforts you've made are greatly appreciated, @Killian. I see the importance and urgency of this matter and I'm here to help you successfully match your invoice to your bank transaction.

When matching transactions in your bank feeds, it’s essential that the amounts entered should be identical. Keep in mind that any associated fees can affect this process.

At the same time, QuickBooks Online (QBO) won't match transactions if your invoice amount is greater than the amount shown in your bank feeds. Only the same or lower amounts will appear in the Find other matches section.

With that, you'll need to manually receive payment for the invoice and deposit it in your bank including the processing fees. I'm here to help you out in accomplishing this process.

Firstly, find the invoice you want to match from the transaction in your bank feeds and go to the Received Payment page. To do so, here's how:

1. Head to the + New, then select Receive payment.
2. From the Customer dropdown, choose the name of the customer.
3. In the Payment method dropdown, pick the payment method.
4. Select the Payments to deposit or Undeposited Funds, from the Deposit to dropdown.
5. Tick the checkbox for the invoice you're recording the payment on in the Outstanding Transactions section.
6. Click Save and close.

See this article for reference: Record invoice payments in QuickBooks Online

Once done, let's go ahead and deposit the money at your respective bank. I'll gladly walk you through the process of completing this.

1. Go to + New, then Bank deposit.
2. In the Account dropdown, choose the account where the funds are to be deposited.
3. Tick the checkbox the checkbox for the transaction.
4. In the Add funds to this deposit section, add an expense account in the Account column.
5. From the Amount column, add the exact amount of the processing fees and make sure it is negative.
6. Once done, Save and new or Save and close.

For reference, you can scan this article: Record and make bank deposits in QuickBooks Online.

Afterward, return to your bank feeds page and match the corresponding invoices to its bank transactions.

For more detailed guidance on ensuring your bank statements in QBO match your actual bank records, you can refer to this article: Reconcile an account in QuickBooks Online.

Don't hesitate to reply to this post if you need further help in matching your transactions in QBO. I'll make sure to help you out anytime.