Click on + NEW PAGE on the left of the screen (if you don't already have an Investment, interest & dividends page on your tax return)
Select the Investments, Interest & Dividends Page
Click on + INCOME
Select Interest from the drop down list
Leave this amount 0
Answer NO to was taxed already deducted
Answer YES to was this foreign bank interest
Enter the amount in the box that appears
Choose the country from which the interest was received from
Then press SAVE