I have an Foreign saving account and I have about 8 ( eight ) $ of interest income in whole year


I understand that I have to mark yes if I have an foreign account on schedule B
But
? Do I have to report this 8$ foreign income on 1040
If yes then where on 1040
Do I have to submit some kind of proof that I got 8 $ of foreign interest ( foreign bank does not give 1099 Int

You must report foreign interest income on schedule B. You do not need to submit any proof.

You report interest on Schedule B, which carries onto Form 1040 line 8a.

By the way, If you have paid any foreign taxes on this income you can take a credit for the taxes paid by filing Form 1116.