Enter a 1099-Int under
Federal
Wages & Income
Interest and Dividends
Interest on 1099-INT - Click the Start or Update button
Don't type the bank name or try to import it.
At the bottom pick - Change How I enter my Form
Then on the next screen pick I'll Type it in Myself
Yes, you can enter your interest income in TurboTax Online. Here's how to do it: