i love how everyone is calling op out for making the legitimate complaint that it's not cool to put financial stress on a kid that's 13 years old and has dyslexia (which probably makes his job of actually doing the bills/taxes/whatever 100% harder)
like sure i'd understand if they asked him for help around the shop with some tasks the parents need help with like cleaning up the store after a busy day, but it's just downright stupid to saddle a dyslexic 13 y/o with the stressful responsibility of forcing him to manage an important aspect of the family finances like paying the bills