“Yes! You should file all of your sources of income on the same tax return. All you’ll need to do is report which types of income you have, and how much you made of that type.”
“If you pay for something that is considered “ordinary and necessary” to run your business, then it’s deductible.
Questions you can ask yourself are: 1) Do I need this to run my business? or 2) Would this improve my ability to run my business?”