Hi, I have a complicated cost basis question. Decades ago, when I was a kid (I don't know the exact year, but approx 1979), my dad bought some shares of a stock for me, and that stock was on a dividend reinvestment plan, so many more shares were acquired at different price points over the years. Also, along the way were stock splits, symbol changes, etc. I don't have any complete or detailed records of how many shares were initially bought, how many were bought via dividend reinvestment at what prices, etc, and other than a small portion of the shares which were bought in recent years, my broker doesn't have this information either. In 2019 I decided to sell ALL of this stock, and now I have no idea how to calculate the cost basis for all the shares I had. But I don't want to just leave it at $0 either. Can anyone help with this situation?
