This has been answered over and over. Search. Or just charge to whatever you want.
Actual answer: Most agree on 80% for typical daily use to maintain battery health. Charge to 100% whenever you need the range. Don’t overthink charging, just avoid letting the battery sit full or low for extended periods.
I charge to 90% on my Lightning, as recommended. Sometimes I go to 95%. Before trips, I go to 100%, and if I’m driving more than 50 miles, I might do 95% if I remember.
I charge to 90% for daily use and typically don’t charge until I’m around 30%. Before road trips, I always charge to 100%, even if I could make it with 90%.