Hello there, @mkavuran.
I appreciate the screenshot that you gave. At this time, being able to include the "Due" line when printing an invoice in QuickBooks Online isn't an option for us. This is because the line will only show up upon creating an invoice from an estimate which doesn't possess a specific template.
For now, to incorporate the details on the due line section of your invoice, you may copy information and add it under the description column. In that way, it will be appended upon printing the invoice.
I can see that this feature would be convenient for you and your business. That being said, QuickBooks is committed to developing simple, intuitive software that includes new features based on the preferences we've received from customers like yourself. I encourage you to visit the QuickBooks Online Blog to be updated with our latest news and innovations.
Let me know if you have any other concerns. I'll be around to lend a helping hand. Wishing you well!