Quarterly Filing

Is there a webinar or something. Nothing has been working to ask questions. All I need to know is that I am currently a 1099 contractor and have an LLC/self employed. How important are filing quarterly taxes and how do I do it and should I be doing it? Do I get penalized?

 

Basically I just need a quick crash course on how I should be doing taxes throughout the year being self-employed.

 

Please help