In 2016 I filed an 83(b) election for some ISOs I received as part of my employee compensation. I did not completely understand the 83(b) election when I made it, I still don't to be honest. There are resources online saying different things. I expected the company to do very well in the coming years (it has) which is why I filed the 83(b).
I did not realize I needed to send a tax payment to the IRS at the same time, or within the same year I filed the 83(b). So I filed the 83(b) and the IRS sent me back one of my elections letters (I sent multiple so they could send me back a date stamped copy) with a date stamped on it, acknowledging they received the election.
Question is, where do I stand with my options and the IRS if I never paid taxes but filed the election? Is my election still valid? If not is there anything I can do to make it valid?