@Bink33gas what is your question about foreign tax credit ? What category of foreign income that was taxed and by which country? Is your tax home in USA? Are you a citizen/Resident ( GreenCard)/Resident for tax purposes ?.
Generally the foreign tax credit is used to reduce the effects of the double taxation by both USA and the foreign Taxing authority on the same income. This is because USA taxes its citizens/Resident/Residents for tax purposes on worldwide income while most countries tax on the basis of residency / territory. US recognizes the full taxes paid to a foreign taxing authority on the income ( doubly taxed) , but the allowable credit per year is based on a ratio of the US person's foreign incomes to US sourced income. The foreign tax credit that is disallowed for the year , can be carried backwards or carried forward for 10 years. Or one can use the foreign taxes paid as a deduction , if one itemizes ( but SALT limits may reduce the efficacy of this ). Also tax credits from income of different categories of income can only be used to reduce taxes for identical categories.
If you are talking about foreign tax credit for dividends etc and under a limit ( $300 for single filer, $600 for joint filer ) then the whole amount is available as a credit without using the form 1666 and its ratiometric limitation.
Please answer my questions and perhaps I can help you more on the subject. I am a retired tax professional ( not associated with TurboTax )
