What do you wish you knew about paying taxes earlier in your career? What advice would you share with a new trainer?
Oh, taxes are a big problem but you should learn a lot from your own experience. For the other, I would recommend reading about nitration of methyl benzoate at https://studyhippo.com/exp-3b-nitration-of-methyl-benzoate/ and similar to this. Some lessons are difficult but very important for your growth. No exception for taxes.