Welcome to the Community. Currently, the option of paper print checks is unavailable in QuickBooks Self-Employed. You'll have to manually write a check. However, to write a checks you'll have to enter it from the Transactions Menu.
I understand the importance of this option to print paper checks is much necessary for you and your business. Rest assured, I'll personally send this feedback to our product developers. This way, it might be given a chance to be added to our next products update.
Let me know if there's anything I can help you. I'm always glad to help. Have a great day!