In case it's useful for Vanguard users: The Vanguard consolidated 1099 form (which includes 1099-DIV), on the page "Mutual Fund and UIT Supplemental Information", lists "FOREIGN SOURCE INCOME PERCENTAGES" for each fund that has foreign source income. The percentages listed are
Fgn Source Inc Tot
Fgn Source Inc Qual
Fgn Source Inc Adj
The first two, "Fgn Source Inc Tot" and "Fgn Source Inc Qual", matches up with the percentages listed in column 1 and 2 of the "Foreign tax credit information for eligible Vanguard funds" PDF, available here for 2021 tax year: https://personal.vanguard.com/pdf/FASFTCWS_R_012022.pdf
[I am uncertain about this paragraph:] I think the OP is looking for "Fgn Source Inc Qual" (i.e., Foreign source qualified income) because I think this is the sum of foreign source qualified dividends and foreign source long-term capital gains. I think this percentage should be multiplied by "Total Dividends & distributions" for each fund to get the dollar value of the foreign source qualified income for that fund. Then sum over all funds to get the total foreign source qualified income.
