Thanks for your reply. Yes, I agree but for the covered shares whose basis is reported to IRS, there were no corporate actions in the timeframe I owned them (since 2010). These covered shares were the result of dividend reinvestment, so the basis is well documented. It is those shares that were adjusted for the spin off (because of the confusion with the spin off date, I assume) and should not have been. The other shares are listed as non-covered and are a nightmare to figure out the basis. They were gifted at different times and include original shares and 30 years of quarterly dividend reinvested shares. Some of the shares (AT&T Corp) date back to the time prior to the 1984 divestiture that created all the baby bells including AT&T Inc, one of which (SWB), remerged with AT&T and SWB took the AT&T Inc name. So today's AT&T Inc shares are a combination of historical AT&T Inc and SWB shares. I used the AT&T cost basis calculator to make a best guess at the cost basis for those gifted shares.
