IRS requires details to be listed on a Form 8949,
or on your other forms (e.g. consolidated 1099-B) which have the same information and in the same manner as Form 8949.
Either way, if you choose to summarize, you have to mail the transaction details to the IRS within three business days of IRS accepting your e-Filed tax return.(unless you have attached a PDF of the transactions details to your e-Filed return.).
Exception: if you summarize Category A or Category D, Form 8949 is not needed for transactions without adjustments. No mailing is necessary.
If you don't have a 1099-B for crypto your sales category is C or F.
There is no exception for these categories.
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As pointed out you have to file 2020 on paper, so you can include the printout with your filed return rather than mailing to a separate address.
The consolidated 1099-B in PDF can be submitted at e-File time using TurboTax Online only (as of 2020), but again as also pointed out, it is too late to do it that way.
