I should add... All of my 2017 CLCO are short term losses. I used the max ($3,000) for 2017-2019 but then realize in 2019 that I forgot to report a portion of the 2017 1256 losses. My accountant gave me a copy of the 1040x, Schedule D, and 6781 forms that were submitted to the IRS for 2017 amendments.
Now in 2020 I have substantial short term gains that I would like to use the entire capital loss carry over. I am not sure how to enter this into Turbotax. It seems when I inserted 1256 to include 2020 gains and then another for 2017 amended Turbotax calculated this correctly to write my losses off against my gains, however, I seems you are stating this is incorrectly reported.
