Yes you can enter the Total of all accounts for the same bank. Maybe you can log into your bank account and download the 1099 pdf or even import it. Banks should have the 1099 tax statements listed online. I would assume if you have 3 accounts the total interest its over $10?
Enter a 1099-Int under
Federal
Wages & Income
Interest and Dividends
Interest on 1099-INT - Click the Start or Update button
Put the total amount in Box 1
Don't try to import it. On the Let Us Enter Your 1099 page scroll down to the bottom and pick Enter a different way
