How do you find auditions for tv shows or movies? I am really interested in becoming a actress!?

It sounds like you're really interested in be becoming famous not in being an actress......there's are opportunities to act in most communities that don't involve tv or movies.

Mostly in Los Angeles

If you live in a large city, see if there is a website for: The Mayor’s Office of Film Theatre and Broadcasting It will have informationon what is being filmed in your city.

Most of these are cast in LA or New York. If you are a beginner, I suggest getting as much experience as you can in your area. This would involve auditioning for community and university theatre, reading up on the subject, and getting an agent in your area. Many industry folks advise that you get some experience in a mid-size market like New Orleans, Chicago, Austin, or Houston...before moving to the larger markets mentioned above. It is a VERY difficult business to be successful in. The percentage of "working" actors, is far smaller than those struggling to even get an agent. It can be truly rewarding, though. Take some classes and do some theatre...you may get the bug! and find out you'd rather do nothing else....I know I did! GOOD LUCK!

all of these websites allow you to submit yourself for projects: nowcasting.com, actorsaccess.com and lacasting.com...actorsaccess.com is the only one that has projects outside of los angeles....and your state film commission will also have information....and check out sag.com for general info for getting started...

most autitions for tv shows movies and commercials are usually done through agencies who have a list of people wanting work in those areas, i suggest joining one of these agencies

Just come to LA, i use to work on movie and tv show sets and they even cast on location some times. But they always have open casting calls in the valley like in Burbank and Hollywood.