1099-B sale of private company stock with 2 transactions because of escrow

How is this situation handled?

 

Employee had ISO stock that was purchased years earlier. Company was bought and stock had to be sold.

 

When the sale happened, a small percentage had to be held in escrow during the sales / transfer process.

 

Therefore now on the 1099-B there are 2 line transactions. the CUSIP's are different (one ends in COM for common and the other ESCW for escrow). Each line is showing a proceed and different dates. However has the escrow was holding say 3% of overall funds, the form is showing the same number of shares for both lines, effecting doubling this for the total. 

 

the sale dates for each is different and relatively close, i.e. 4 months apart in the same year of course.

 

these were uncovered. no tax was withheld and cost basis is not listed (but documented in other paperwork, so easily known).

 

So in entering the 1099-B stock sale, I am only seeing to enter both lines of the sale. So the first line is easy as that's what I am detailing each purchase date and cost for. But the second line, for the small escrowed sale … what to do? that ESCW cuisp had no cost, maybe an acquisition date of the main sale... and now the stock count is doubled ! 

 

any advice on this? thanks !