I'm attempting to create a 2019 Form D-40X (Amended Individual Income Tax Return) with ProSeries. I may be going about it the wrong way, but here is what I have done so far:

1. SAVE AS to leave the original copy unchanged/untouched. (I just added "amend" to the end of the original file name of the copy).
2. On the DC Info Worksheet, in Part IX - Other Information, I clicked the checkbox that says Filing an amended return this year?.
3. I made the minor amendment that needed to be made.
4. SAVE to save the changes made to the amended file.

However, when I print the forms to mail (since this amended return cannot be e-filed), it's a regular D-40/Individual Income Tax Return, and not a D-40X/Amended Individual Income Tax Return. Does anyone have any pointers or can point out what I did wrong?