So everytime I google this, there are lists of things you can claim on but I still don't understand what "claiming" means. This is my understanding but not sure if its correct. If I made $70,000 gross sales, $50,000 net profit, $20,000 worth of expenses, instead of my net profit being taxed at $50,000 I take the expenses $20,000 away so I only get taxed at $30,000? Please help me!