In the past, TT has prompted me to enter and/or review the use of part of my home as an office for my business. I don't believe it did so this year, at least so far?

To enter information about your home office, please follow these steps:

1. Click Income and Expenses and then click the Start/Revisit box in the Self-Employment section.
2. On Your 2019 self-employed work summary screen, click on Edit next to your business. 
3. On the Here's your [business] info screen, click on the box Add expenses for this work.  
4. On the Tell us about any expenses screen, scroll down to the Less Common Expenses section and mark the  radio button next to Home Office.  Click Continue at the bottom of the screen. 
5. On the screen asking if you have a home office, mark Yes and click Continue.
6. Continue through the screens, entering the requested information about your home office.
7. When finished you will see the Home office summary.