really need to mail physical copy of 1099-da? - celsius

I have a 1099DA where the cost basis is unknown, because this is due to the Celsius bankruptcy.   

 

from turbotax:  "How do you plan on submitting your 1099‑DA to the IRS?

You'll need to mail a paper copy to the IRS."

 

I've even tried experimenting with different in puts and it always say that for any 1099DA.  Actually. turbotax requests a bunch of information on the DA  (do I edit in Adobe?) which I do not and cannot have:

 

"Take a moment to double-check that your statements are complete. For each sale listed, there should be:

  • A description
  • Date acquired
  • Date sold
  • Sales price
  • Cost basis
  • Gain or loss for each sale
  • A sale category based on how the sale was reported to you and the IRS"

 

However none of that is listed on the 1099DA because paypal has no insight, and the original company went bankrupt, - also much of that info I literally cannot know, because I don't know when my GUSD was converted to BTC.   

 

Questions: Am I supposed to make up my own 1099da with this info?   Do I really need to mail a physical copy of my own sort of 1099da where I've shoved in estimated cost-basis values?  Seems like this should all by handled by 8949, but this is where turbotax is ducting me.