Yes, you will need to delete anything you entered in the IRA section if that was for the 401(k) contributions reported in box 12 for your W-2 (and already deducted from box 1 of your W-2).
An IRA is different than a 401(k), and you only make entries in the IRA section if you contributed to an IRA.
For the foreign tax, if TurboTax is not asking about the country, it has all the information it needs for your foreign tax credit.
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