Yes, you should be able to edit Form 1099-INT after it's imported to your return. Go to Federal >> Wages & Income >> Investments and Savings >> Edit/Add. Click down arrow to the right of the 1099-INT you need to correct, then click Edit.
The easiest way to find any section of TurboTax is to open your return and use the Search box at the top right side of the TurboTax header. Click on the magnifying glass, type in "1099-INT", hit Enter, and click the "jump to" link to go directly to beginning of that topic.
Or go to Tax Tools >> Tools >> Topic Search. Type in your topic, then click the topic in the list to go directly to the start of that section.