I'm unclear about the premise. Why do we need to say the reading level? Is this for something to turn into the state for homeschooling purposes or what?

We've never considered our child to be at a particular reading level or said or reported this to anyone. Once he could read well we figured he could read and beyond that there wasn't much point in trying to summarize that with a single reading level. For homeschooling purposes I have tried to keep an eye if there are particular reading related skills (summarizing, reading charts and graphs, etc.) that he needed to work on.