the mutual fund should report to you the foreign source income. A foreign-based fund may have non-foreign-source income. There's no place on a 1099-div to report this so the fund should send you a tax reporting statement or some other document. Call them. you can't use zero because then you won't get the FTC.
when entering a 1099-div or int with a FTC and you file form 1116, the first 1099 should be linked to column A of the first 1116. the 2nd should be linked to column B and so on. if there are more than 3 you need a second form 1116 so the 4th 1099 would again be linked to column A
note that if you are single, your total passive FTC is $300 (it's $600 if married filing jointly) or less you do not need form 1116. in this case on each 1099 only enter the FTC nothing else about the FTC.
