We homechooled our D, now a graduating senior at a flagship state uni, from 5th to 12th grade. No one ever bothered us at all. When she applied to college 3 years ago, none of the schools asked for “proof of homeschooling.” She was admitted to several prestigious univ, including some ivy-league schools.
CA law requires the homeschool to maintain a curriculum, and an attendance record. It doesn’t say what the curriculum should be, so we printed out a copy of CA public school curriculum and kept it on file “just in case.” The attendance record was just a calendar with a check mark for each “school day.”