Tax tips for new Sole Proprietorship (2nd job, expensing)

Thanks in advance for any help you can provide!

 

Here's my situation: I currently have a paycheck and W-2 from my full-time job. I also started a counseling business in 2020, as a sole proprietorship. I see clients virtually via Zoom. I'm renting a 2nd apartment to conduct my sessions, since I didn't have room or confidentiality at home. 

 

QUESTION 1: Can I expense the 2nd apartment? 

 

QUESTION 2: What other factors should I be aware of, in terms of filing my taxes? I know this is a super broad and newbie question. I've hired a CPA to complete my 2021 Federal and CA tax returns, since I wanted peace of mind that it would be done correctly my first year.

 

QUESTION 3: When should I consider getting accounting software? I'm keeping track of expenses and income on a spreadsheet. It's pretty easy so far.

 

Any advice or experience here would be much appreciated! Thank you!