How late could I receive a corrected 1099?

If you have some securities like a BDC or a CEF or an MLP or a few of the other more exotic holding type companies, they formally have up to 3 years to choose to recharacterize payments out. I.e. they could change dividends from qualified to non-qualified, that new category of 199A dividends, or even change them to return-of-capital.

I am pretty sure that the statute of limitations on a tax return is 3 years or 6 years, depending on the nature of the error. So that would be the next time limit. I feel like if you made a good faith effort -- you filed correctly given the 1099 in your hand at the time -- the IRS is truly going to work with you to be equitable. But, if a gross accounting error occurred, new 1099s would need to be issued, and you would be responsible for making square with the new information, even if it is more than 6 years after the fact.

All that said, it seems to me that this could be resolved with just talking with someone at your broker that actually can verify that the form was calculated correctly...