(Note: I suspect this is an old post from the 2015 tax season in Jan-April of 2016).
In the 2015 software, Create your own 1099-INT form as coming from the "US Treasury"
Put the interest received on the bonds in box 3 of that 1099-INT.
1) if they were all EE bonds. Subtract half the face value from the total proceeds....that is the interest received.
2) If they were all I-bonds. Subtract the face value from the total proceeds...that is the interest received.
3) If they were a mix of I- and EE-bonds....you've got a problem if you haven't kept detailed track your self....talk to someone at the Chase branch you dealt with. Maybe they send the 1099-INT to the wrong address, and you can get a copy there.....if at a branch you are no longer close to...find any Chase branch and talk to the staff there. They may have computer access to those details.