It is unlikely you can hold your employer liable after all this time:1) First, your employer is *not* responsible for all injuries occured while working or driving a work vehicle; it is only responsible if at fault in some way (e.g. unsafe work conditions, or a poorly maintained vehicle where the poor maintenance contributed to the accident). If there were not at fault, they would not be liable, since your employer is not your insurer.2) After a year-and-a-half, even if your employer was at fault, it may be difficult to prove that, or that your injuries came from that accident (and not, for example, a subsequent or later accident or event or overuse, especially if severe pain started up months after the accident, which is what your question seems to imply).You write that you "saw a chiropractor and doctor near that time" of the accident, so whatever delay occured due to the incorrect ID number does not appear to have been significant, so there's probably no liability in that regards.If another driver hit you or was at fault in causing the accident, you could try to sue him or her.