Let me welcome you to the Community, @cds4us.
In QuickBooks Self-Employed, you'll need to manually add income and expense transactions and categorize them depending on the business you have.
Based on the details entered, this will help us calculate your quarterly tax estimates. I'll include the following articles below for your guide.
QuickBooks Self-Employed Version
Manually add transactions in QuickBooks Self-Employed
Categories in QuickBooks Self-Employed
If you need anything, I'm just a post away. I'd like to help however I can. Cheering you to a fantastic year ahead!