Yes, you can delete the €26.60 refund as well as the invoice and the payment, Killian. Then, write a check with the sales entry details and fees.|

To remove the refund:

1. Navigate to the Transactions menu on the left panel and the All sales tab.
2. Look for the refund you're working from the list.
3. In the Action column, select Delete from the ▼ dropdown.
4. Tap the Delete button to confirm the action.
   
   

For your other entries, follow the steps in this article to carry out the task: Void or delete transactions in QuickBooks Online. 

After performing these steps, write a check for the transactions. See the attached screenshot for visual reference:

For more insights about removing or processing refunds to customers, feel free to browse this article: Void or refund customer payments in QuickBooks Online.

In addition, you can use these resources to keep your suppliers and customers balance in order and handle other sales-related entries:

• Manage outstanding balances for customers and suppliers in QuickBooks Online
• Topics about your company's income and customers

Keep in touch if you have other banking concerns or additional questions about managing other transactions. The Community is always ready to provide the assistance you need.