Contact Support.

What is the TurboTax phone number? (intuit.com)

"So they give you SCH D and and 8949 file""

If that 8949 file is a PDF file, TurboTax Online will ask you for that file when you use the TurboTax Summary option.

The same goes for your other transactions for which you have details ready.

I don't think  TurboTax will take multiple PDFs, so you may have to use a PDF editor to combine them into one PDF file.

@seccam 

Contact Support to know what other formats you can supply, i.e. Excel spreadsheet.

I don't know whether  TurboTax allows other formats.

@seccam 

Yes crypto.com tax software gives 8949 and sch D but they also give 2 files ..one is for turbotax online which is .csv and other is for desktop software which ends with .tfm or something 

they also give ready made .csv file - taxact.com

now I am debating - should I go ahead with TurboTax premier which costs about 100$ - in this option I don't have to send anything via mail to IRS  or I can use freetaxusa to efile but have to send 8949 via mail which is about 100 pages big file so 100 printouts  (because they don't support outside file upload) 

What do you suggest ?

is there any way like discount code for turbotax premier?