I sold some stock I received from an employer back in the 1980s (I think).

It may have been part of an ESOP or PAYSOP and the company doesn't seem to have records. My 1099-B shows no information for Date Acquired, and the cost is listed as 0.00.  Do I need the date acquired to file my taxes?  If so, can I guess?  What about the cost information?  Will the IRS (and TurboTax accept a cost of 0?

 

The amount is small (I only sold 15 shares as a test), but I'm retired and plan to live off the sale of the rest for the next few years so I need to get this resolved this year.