I know this is an old post and I don't know if it got answered. However, I had the same issue in the 2022 version. I finally figured out the solution. If the client has prior bonus depreciation or prior section 179 expense, you have to add up all prior depreciation and enter the total in the 'Prior depreciation' field.

For instance, if the client has $5,000 in prior depreciation, $7,000 in prior section 179 & $2,000 in prior bonus -- you would enter the total of $14,000 as Prior Depreciation. Hope this helps!