What about your partner, if you have one? What does s/he do?
I'm a single parent (kids are a toddler and a 9 year old) and I find the days pretty busy with bags, lunches, washing, tidying etc. But I'm normally relaxing by around 8pm.
Example day, if it helps...
6:30 up - kids still asleep. Make coffee, put lunches in their bags, shower, make up, wake up eldest, make their breakfast, do eldest's hair, wake up youngest and dress him etc. They eat, I load up the car.
8ish - leave, drop younger one to childminder and other one to school. Drive back in opposite direction for work.
8:45 - 4:30 work
4:30 - leave to pick up kids
5:15/5:30 - Home, do kids' dinner, something easy and quick normally, get changed, sort out their clothes for next day, do their lunches and put in fridge, wash up, do a wash load and put away yesterday's washing, tidy up. Youngest in pyjamas, bath if needed. Homework with eldest. Glass of wine somewhere in amongst that.
7ish - take younger one up for teeth brushing and stories, and then bed
7:20 - offer older one snack, do her a hot water bottle and leave her to chill out until 8 whilst I make my dinner. While it cooks I either sit with my iPad and some wine, or do some yoga.
8ish - eldest to bed
My tidying up is always basic during the week.
My house isn't spotless.