not saying you're wrong. but reporting different from the 1099B is going to get ou a notice from the IRs - it might even be 2 to 3 years down the road
"My original bonds were exchanged for worthless bonds." are you sure? some bonds pay no interest. they are issued at a discount and accretion occurs every year on an effective interest rate basis. finally, at maturity you get the face value of the bond.
generally, when bonds or stocks are exchanged in a taxable transaction, there is a worksheet that is issued by one of the company's to figure everything out. Ask your broker to provide you with a copy. supposedly this is what they used to generate the reporting.
