In my last tax filing I forgot to include one 1099-DIV that I do report every year. Not a huge amount - less than a $1,000.
The IRS did not discover the mistake and in fact already mailed me the refund check.
I only discovered it now, while cleaning my horribly messy desk (which is why I missed that one - the envelope wasn't even open).
My girlfriend say "forget about it - if and when they discover it, pay it".
I think differently. I think that I should notify the IRS as soon as I learn about the mistake. I just don't know what's the procedure to do that and whether I should wait for next year's filing.
What should I do?
Your advice would be appreciated.
Thanks in advance.