Can't say I'm looking forward to submitting quarterly accounts!
I'm 69 in a month's time and only working because the state pension doesn't even cover the rent 😵💫 a lot of my work has wound down now, my actual business turnover is under 20k
I think you need to sit down and re evaluate what you are doing. How long do you think you will keep that up, and what will happen when you don't ?
If i was you i'd be doing one of them benefit checkers , twice... both as you are now and then what would happen if you where not working. You may be entitled to housing benefit ?
Some very quick and dirty math based on what you have said tells me you're literally working for nothing. You say under £20k, i'm gonna guess £18K, your expenses are £4k........... Tax etc on the remaining £14k would be 25% so you pay £3.5k tax ? Leaving you with, what.... £11K.. £211 a week ?
Pension credit and housing benefit MAY top that up for you if you aint working. I dunno, maybe you feel fine and can keep that up, but either way you'll have to address that sooner probably rather than later.
If i was 69 i certainley wouldn't be worrying about submitting quartlerly accounts thats for sure