Hello Willybood,
I appreciate you for getting back to us here in the Community. Allow me to step in for a moment and help you with your question about tracking wages in QuickBooks Self-Employed.
You can set up your Tax Profile to help calculate taxes based on your income and expenses. In this version, you can download your Tax Summary and use this to complete the Self Assessment.
For more insights into the available options you can with the Self-Employed version, I'm adding the article I recommend on this:
If you want to upgrade or know more about the functionality of the two QuickBooks versions, please visit this article for additional reference:
QuickBooks Self-Employed vs QuickBooks Online for Small Business.
The Community has your back, so feel free to let me know if you have any additional questions with your wage payments.