1099-B

[GAHK86]

I received stock as part of a merger because I held stock in one of the merged.  I sold these stocks and received 1099-Bs.  These have no Date Acquired. How do I report these?

[Mike9241]

if the merger was non-taxable the holding period starts with the date the original shares were acquired. 

[GAHK86]

What would the cost or other basis be?