If you know the amount of interest that was taxable income, then you should include it in your return as if you received a Form 1099-INT reporting the interest in box 1.
For the question of where is the interest from, you can enter a description such as 'estate of ____' and then include the amount in the box 1 entry.
Use the following steps to go directly to that section of your return:
- On the top row
of the TurboTax online screen, click on Search (or for
CD/downloaded TurboTax locate the search box in the upper right corner)
- This opens a box
where you can type in “1099-INT” (be sure to
enter exactly as shown here) and click the magnifying glass (or for
CD/downloaded TurboTax, click Find)
- The search
results will give you an option to “Jump to 1099-INT”
- Click on the blue “Jump to 1099-INT” link