You can enter the interest in the section for 1099-INT in TurboTax. You will leave the field for "EIN" blank (if it is presented). The interest will go in the Box 1 area.
Since the tax withheld is foreign, you will enter that information in the "foreign tax paid" section. The simplest way to enter this is to check the box "my form has additional boxes" and put the data in the are for Box 6.
Alternately, you can enter the tax paid in the Foreign tax credit section of TurboTax. Be sure to visit that section to ensure that the credit calculates for your tax paid to the foreign country, if eligible.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"