I had ~$84 in capital gains that I forgot to claim (1099-B), and have already e-filed and received my tax refund. Is it necessary for me to file a 1040X now to correct?

Not trying to skirt the system by any means, I simply forgot I was getting a 1099-B until now and had already completed my taxes in early Jan.

Can I claim this gain next year instead? Ultimately, I am not even sure it would have had any effect as I received a decent refund.