Ok, business owners... I want to start my cake business from home. What is everything I need to make it legal?? LLC , business ins, etc??? Do's and Dont's? 

thanks all

Start with your local Health Department. They will tell you if it can be done and what the legal requirements are where you live. If you live in the US not all states have a Cottage Food Law, or they have so many restrictions it's not really viable. I'm in Northern California. I went in and they gave me a packet with all the things I needed to know in it. It's also good to know that the permits and licenses are only good for the calendar year. So if you were to get everything done and pay all your permit fees this month you would be paying again in January so it's probably not worth it to file everything until 2017.

As @Pastrybaglady ‍said, it depends upon where you live. If it's in the U.S, the states that have a cottage food law regulate it differently. Some are administered by the county health department, some by local municipalities, but most are through the states' Dept of Agriculture and Markets.