I have asked basically the same question as I am in the same spot (and those last 10 are TOUGH), and I was told to journal you calories and find what's right for you.
Start with a good idea of your bodyweight/bf% and determine your BMR & exercise.
Pick what should be a defecit of at least 500 kcal/day and evaluate in a couple weeks.
Every formula I found for BMR was different, every energy expenditure for exercise was different, and nothing helped. Even if you go to the trouble of an exact hydrostatic bf calcultion, it's still only giving you an approximate BMR. Your thyroid is your thyroid, you perform exercise the way you perform exercise, etc... Way too many variables to know, "from the jump" where to exactly start. That's why you approximate.
I was 180 when I started this and, based on my bf and activity level, calculated 2850 as my maintenance calories. I have been journaling to keep myself at about 2100 kcal/week (didn't want to start too low and shut down thyroid) and I have been losing about a pound a week. I'm fine with that because I was stagnant for a month.