Glad to see you in the Community, r-hadenelectrica.
Let me share some info about your concern.
For now, the CIS feature is only offered in QuickBooks Online. This is why you're unavailable to find the option in your Self Employed settings.
If you need to use the feature, you may want to switch from QuickBooks Self-Employed to QuickBooks Online. Please feel free to check out this guide: Switch from QuickBooks Self-Employed to QuickBooks Online.
You can also visit our website here for the product pricing and plan comparison.
To learn more about the CIS feature in QuickBooks Online, here's an article that you can read: Already using CIS in QuickBooks?.
Please leave a reply below if you have any follow-up questions or need help with other task in QuickBooks Self-Employed. I'll be right here to help. Take care!