See the TurboTax article below to get started with Form 1116:
Where do I enter the foreign tax credit (Form 1116) or deduction for 2019?
As you go through the steps in the article above and select to take the credit, TurboTax will recognize that you entered foreign taxes paid in the interest income section of your return.
as stated you report the interest as income and on the same form enter the FTC or in step by step mode when it asks. note that if you are single you can claim FTC of $300 or less ($600 if married) without filing 1116. enter the FTC and don't link it to a form