A couple of comments:
- I agree that with the information provided, we can't provide too much more assistance.
- Calling Investor Relations, while an option, experience tells me they won't be able to be much help
- TT Live will want you to provide the sales price AND cost basis. They won't provide help in determining the cost basis
- Since no company names were provided, I would recommend doing a Google search - Public Company XYZ merger with Company ZYX (of course using the actual names). There may be better information available in helping you determine the cost basis in the Public shares and gain on the cash received. @Mike9241 gave you a starting point which may help when reviewing other details on the merger. Since the company was public, there will most likely be something out there to help.
*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.
