Get your taxes done using TurboTax

The best thing to do would be to elect to use the simple method of calculating home office expense in this situation.  It will alleviate the issue of your wife not being on the mortgage as well as determining percentages of utilities and other expenses. To do this in TurboTax Online please follow these steps:

1. Within your tax return search Home Office Deduction using the magnifying glass at the top of the page
2. Click Jump to home office deduction
3. Click Review on the 2021 Self-Employed Work Summary page
4. Click Start or Edit whichever shows next to Home Office
5. Click through the screens answering the questions about using the home office if they are prompted
6. Enter the start date of the business - if it was in business in 2020 or earlier enter that date
7. Click through the questions including entering the square footage of the office space and the square footage of the entire living space of the home
8. On the Simplified Home Office Deduction page click Yes, I want to use the simplified deduction and continue with the remaining questions

For additional categories of deductible self-employed expenses see What self-employed expenses can I deduct?