Hi there, Oj269.
Syncing data between QuickBooks Online and QuickBooks Self-Employed (QBSE) is unavailable at this time. This is because they're different programs and are designed for different types of businesses.
Our engineers would love to hear your your feedback about getting a syncing option between QBO and QBSE. Let's send it directly to them by clicking the Gear icon in QuickBooks Online, then select Feedback.
We're always here if you have other questions. Thanks for dropping by.