If you add securities info, including crypto,
it will appear on Form 8949 either in detailed form (each SELL transaction itemized)
or in Summarized form (subtotals by Box Category)
This will change your numbers on Schedule D.
Schedule D and the new Forms 8949 become schedules and forms that are new or changed and must be included with Form 1040-X.
If you e-Filed 1040, then if you get your 1040 return revised as needed and 1040-X reflects that, you can e-File Form 1040-X.
TurboTax will include the required forms when you e-File 1040-X.
E-File will close on October 15th.
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