Get your taxes done using TurboTax

Thanks. So if I sell the stock before my cost basis drops to zero, I follow your instructions below (I do use the CD/Download version).  What do I do once I reach the point where my basis is zero?  At that point I'm supposed to treat any further distributions as capital gains.  Is that something I have to worry about each year, or do I wait until I sell the stock and figure out a negative number as my basis?