@Nat2 based on your follow-up it appears you have handled this correctly.
Your shares aren't really in escrow, what is in escrow is the potential remaining liquidating distributions
If you receive any further liquidating distributions then you have zero cost basis and all is capital gain; assuming you utilized all of your basis in 2019.
*A reminder that posts in a forum such as this do not constitute tax advice.
Also keep in mind the date of replies, as tax law changes.
