The stock split twice(93' and 98'). Then were a number of things that have happened since which produced stocks in various other companies such as Verizon, Comcast, CenturyLink(via merger with Qwest), Frontier Communications and Vodafone. All the stock was sold in 2015 with the exception of some DRIP stock in Comcast. Do I need to go through the craziness of figuring out the cost basis for each and every stock through all of the transactions or is the cost basis of the original AT&T stock all I need?
If I need to figure out the cost basis for each stock how do I go about doing that?
