I don't need to do my tax return on turbotax. i just need form 8949.
It's not clear what you're asking for.
TurboTax will not produce Form 8949 independently of preparing a tax return.
If Coinbase produces a Fotm 8949, you can summarize it in turboTax and mail the Form 8949 to the IRS.
@hrv72
"TurboTax will not produce Form 8949 independently of preparing a tax return."
If you want only a Form 8949 you have to use the descktop version which allows "Forms Mode"
More info is needed to understand what you want to do.