Nice question, michelle107.
I can shed some light on your question whether its your personal tax information or business information is needed in your tax profile
When setting up your tax profile in QuickBooks Self-Employed (QBSE), you'll be using your business tax information which includes your filing status, dependents, annual income from your employer and other.
You can find more information about setting up your tax profile in QBSE in this article: Review your tax profile in QuickBooks Self-Employed.
If there's anything I can help you with, feel free to drop me a reply below. Hope you have a good one.