After you file

" While the 1040X says the capital gains tax worksheet was used, the value reported in column C is NOT on that worksheet in any way."

 

"Figure the tax on your taxable income shown on line 5,
column C. Generally, you will use the method(s) you used to
figure the tax on your original return. However, you may need to
change to a different method if, for example, you amend your
return to include or change the amount of certain types of
income, such as capital gains or qualified dividends."

 

If Col C. amount is not from revised CQCGTW, then Turbotax switched to another method 

and the annotation for  that method should appear on the dotted line.What Worksheet.PNG

.

You may have to do that yourself.

 

@steyaert