@komatthew I'm not particularly familiar with the steps in QBO, but I believe you would click +New, then Bank Deposit as shown in the image from @Jayson_E above.
There should be a spot to choose which bank the interest income is going into (The CD), a spot to select who the interest income was received from (Probably a column named Received From), and a spot to select the account the money is sourced from (Interest Income, probably a column named Account).
Aside from entering the amount and date in, that should be it.
