u/Ecstatic-Extreme-188

I bought a motorcycle a few years ago and I accidentally underreported its value at the DMV in California.
New to the country, not very familiar with the law, I was told AF parts would not be part of the value of the vehicle and I did not declare the full price I paid.
I do not own the vehicle anymore.

What's the best way to correct it? I understand they might never find out, but I would still like to correct it.