Provided all the conditions were met and the stock became worthless in 2019 (since closure may not always equate to stocks becoming worthless), here's what you should do.

1. Under Sch D, click on the QuickZoom button for Capital Gain(Loss) Transaction Worksheet;
2. Click on the Create new copy radio button and enter a description;
3. Click on Create;
4. Under Part II, Line 1, check the box for (f) Section 1244 stock; and
5. Complete the relevant details on the screen.

$100k will flow to F.4797 as ordinary loss and the remainder will flow to F.8949/Sch D as LTCL.