Business Opening A Business And Wondering What Types Of Expenses I Can Write Off?

Opening a business and wondering what types of expenses I can write off? - business

I want to open an online business for website design. (founded as an LLC, I am) the sole owner of Shall I begin, receipts of all related costs? Or my company is regarded as a hobby when I'm doing a certain amount of money a year, I filed.

What are the things that I can cancel my business? (Food, gasoline, etc.) Do I need a separate card or loan. Bank account for the costs?

Am I obligated to accept payments for services of the company through a corporate account, or pay by check or directly to me?