With respect as to how to report earnings on your foreign bank account, the answer is that you will do this on a United States tax return just as you would as if the bank were domestic in nature instead of foreign.
In other words, whether or not you receive an actual US Form 1099-DIV (for dividends) or Form 1099-INT (for interest) you will simply "pretend" that you did, and proceed to enter your dividends and interest in that manner. As such, you can can follow the mechanical data-entry instructions for each type of passive income, as described in each of the following links:
If you also paid any foreign taxes
on those dividends or interest, you can input that data on the very same
1099-DIV and 1099-INT input screens in TurboTax. There will be boxes
provided there, in which you can indicate any foreign taxes paid.
then, reporting the income from your foreign financial accounts is one
thing. Reporting the existence of your foreign financial accounts is
entirely another. In other words, there is a "disclosure" requirement
for every US taxpayer who holds assets in a non-US account financial
account, even if the account or asset generates no taxable income. This
applies to mainland US citizens, territorial residents, and expats,
including those who never return to the US, but still maintain their US
citizenship. Essentially, the government wants to know about your
non-US assets -- how much and where you keep them.
In fact, there are two separate disclosure forms that may be required; each also has different reporting rules. One is known as IRS Form 8938, and can be attached to the relevant yearly Form 1040 tax return. The other is FinCen Form 114, which can only be filed via the internet. The following Internal Revenue Service webpage describes them in some detail, and provides their dollar value reporting levels:
Form 8938 is included in TurboTax. FinCen Form 114 is not included in TurboTax, and you would need to access that reporting webpage separately, if your foreign financial assets total over the limit(s). Note that you can get to the FinCen reporting internet site directly through the above IRS link.
If you are asked about the specific schedule and line where your foreign interest and / or dividends are reported, you would answer that as follows. For interest income it will be Form 1040, Schedule B, Line 1. For dividend income it will be Form 1040, Schedule B, Line 5.Thank you for asking this important question.