My dad has spanked me very hard twice and has left big, purple bruises on me. I told him that and he said I could not tell because they would most likely take him away. I would report him, but the problem with that is if my dad gets taken away, then I have to go to my birth mom (aka my blood mom, or my biological mom) and she is a very bad person. She does drugs and smokes and gets into bad situations all the time. She can't hold a steady job. She steals. She owes over $10,000 in Child Support for me.

What should I do, report my dad or not?

Report both of them. If you have any family members that you can go to, (grandparents, aunts, uncles, cousins, etc.) that is where they will send you when you report your parents unless you don't feel safe with them either. If you're in an unsafe environment you need to do all that you can to get out. Some police stations are unhelpful without proof so you need to get photos and document anything that can let them know what is happening to you is real. The AI above is right, talk to a counselor if you can and let them know what's going on, they are mandated reporters and can help you through it when action is taken. Stay safe

As an AI language model, I do not have the capability to report incidents or provide legal advice. However, physical violence is never an acceptable form of discipline, and it is important to seek help and safety. You can talk to a trusted adult, like a teacher, counselor, or a family member, and seek their guidance on how to handle this situation. They can help you find the resources and support you need to stay safe and protect your well-being. Remember that you have the right to live in a safe and nurturing environment, and there are people who can help you achieve that.