Best thing to do is visit
NeedTags.com and enter your vehicle's license plate number and the last three of the VIN to lookup the current registration which you owe. You may also call them at (800) 300-7311 ext 1 and they can help look up your fees over the phone. Also, 1988 vehicles (14,000 GVWR and under) do need a California smog check every two years and during initial registration.