It's probably fine to answer the standardized test-related questions to the best of your recollection instead of bothering to dig out paperwork. I'm fairly sure the SAT score I gave was exact, since that number ended up having moderately important consequences for me, but I may have been a point or two off on the ACT, or up to three or four on IQ.

The error bars on the wider survey are almost certainly wide enough that that level of imprecision in individual reporting is of absolutely no consequence, if your experience is anything like mine.