How long does a conviction for failing to declare a change in circumstances last?

"Failing to declare a change in circumstances"?

Short of being on parole or on probation, I'm not aware that anyone has to do such things. Beyond updating their address on a Driver's License, that is.

If a parolee or probationer "fails to declare", that will be between him and his PO. What the PO chooses to do will depend on the guy's history. Maybe it's a big deal, maybe it isn't.

If it is, it could be a pretty substantial penalty, depending on how much time he has hanging over his head.