83(b) and reporting income on a W-2

I am a co-founder of a startup and received shares in the company. I think the shares have already vested (though they might be on a vesting schedule - not positive). I completed an 83(b) election last year. The fair market value of the shares on the 83(b) was indicated as $300. I also paid the company $300 for the shares.

My question: Do I need to report any income on the $300, either on a W-2 or 1099? At first I thought I did, but now that I realized I already paid $300 for the shares, does that mean I don't need to report income on them?

Just want to make sure I don't do anything to screw up my 83(b) election. Thanks so much!