Yeah, you don't put in the whole premium you paid for a bond in box 11....but your brokerage should be putting the proper amount in there for you on the 1099-INT they issue. (I guess in a rare instance, it could be the whole amount if you buy one that matures, or is called in the same tax year).
...thus...every year, my Fidelity 1099-INT shows a value in box 11 every year for the APB related to the one bond I have that issues some $$ into box 1. And it is just the amortized amount. (easy to see since I only have one bond with ABP) . and that amount also fairly closely agrees with the change (reduction) in Basis every year for that bond.
I do have more $$ in box 13, that relates to the ABP for my Muni bond $$ in box 8, and that amount also fairly closely agrees with the change in Basis every year for all my Muni's that I hold.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
