The "Foreign earned income and exclusion" interview is in the Less Common Income section of Federal Tax > Wages and Income. 

In TurboTax Online, enter "foreign income" in the Search Box and select "jump to foreign income".

Any tax paid on the foreign income is entered in the Foreign Taxes section of Estimates and Other Taxes Paid. You can go directly to that section in Turbo Tax by clicking on Federal Taxes (on the top menu bar) and then Deductions and Credits.  When the page opens, scroll down to see the list of all items (or Jump to Full List, if it's not displayed).  Select the Estimates and Other Taxes Paid section, then Foreign Taxes Paid.

In TurboTax Online, enter "foreign tax paid" in the Search Box and select "jump to foreign tax paid".

For additional information, see:  Do I need to report foreign income?