Does your self-employed work keep you busy outside of your home office? Many self-employed workers, like drivers and dog walkers, do their best work away from home.
You may still be able to claim a home office deduction. Here's general guidance from TurboTax about home office deductions. You should also check the IRS's website for a more detailed explanation.
If you can claim a home office deduction, here's how to add your home office square footage in QuickBooks Self-Employed.