TT says Home Office Deduction is 0 since Net Profit was <= 0. But NP = $4900. So it seems like this is a bug.

"It turns out XXX isn't getting the home office deduction...that's because the net profit for XXX's business was zero or less..."

TT reports "Net Business Income" of 4,900 on the page titled "Here's the business info we have so far".

TT also reports "Profit or Loss from Business" of 4,900 on the "Let's gather your business info" page.

So, this appears to be a bug:  there IS Net Profit, but TT disallows the Home Office Deduction.