1099-B Cost Basis is blank. How do I calculate it? I originally purchased 100 shares and those were converted to 2 Warrants years ago and expired in 2017.

[cvanveghel]

Hi, I received a 1099-B this year.  I originally purchased 100 shares of stock in 2006 for 6.239 each, in 2012 those shares were converted to 2(two) 5 year warrants.   In 2017 those warrants expired.   How do I calculate the Cost Basis for this as the 1099-B is blank?  My account shows a loss amount for this transaction of -286.68.

[Anita01 · Accepted solution]

If your original stock really was converted meaning the warrants were not received in addition to keeping the stock, then your cost basis in the warrants is the same as your original cost basis in the stock.  The warrants cost you $623.90

[cvanveghel]

Thanks.  After entering the Cost Basis amount it asks "Do you know your capital loss carryover amounts?"  I say No, then it asks to refer to my 2016 Schedule D (Capital Gains and Losses).  My 2016 Taxes did not have a Schedule D so is it okay to leave these spaces blank?  It also asks for my Alternative Minimum Taxable Income from Form 6251, I do not have this form in my 2016 taxes so again can I leave it as Zero?

[Anita01]

yes, you can leave those blank