Small Business Start-Up

Hello, I just started my own small pet business and I mainly work from home but some of my services take place outside of my home when I travel to and from a clients home. I'm curious as to what all I need to do for tax purposes & if a 1099 is necessary? I am married and we plan to file married & jointly like we always do but this is my first time being self-employed. I'm trying it out! I work for myself and currently have no employees as I'm just starting off full-time solo. What all can I include for my expenses? I utilize just about the entire downstairs of my home, the backyard, the washer & dryer, electricity, gas, water, cleaning supplies, a ton of dog supplies, I also purchased a lot of equipment for dog care and grooming. I also use my car to pick up and drop off pets as well as drive to and from clients home to feed and walk their pets. Can I include my vehicle, gas, & miles? I only accept cash & Zelle payments, do I need invoices/receipts? 

 

Thank you!