Hi, I own a hair salon and a small printing business operating from home, I also shoot photos and print. I want to add some more income to work at home with my computer and I don't know where to start looking

So many issues? Are you licensed for the business you do? Is your home, zoned for business.

But my opinion, you time would be better done, by advertising and working what you have.. unless you can design web sites, do programing, or wish to buy and sell products oniline, there are not many real online jobs

Do NOT fall for any online job ads. You probably know that already.
There are basically 3 ways to make money online from home:
1. Selling products, or in a few cases, services. Ebay, your own website, or other sites. This is more difficult than it sounds. I do it some, but only with items I have around the house.
2. Writing for knowledge sites like ehow. They pay pennies per click.
3. Writing knowledge based blogs and selling ads to sellers of products related to your blog, through ad sellers like Google adsense.

There is no such thing as an easy way to make money from home. Some businesses really do work because they have to be very local, like pet and child day care. In your case, with a hair salon in your home already, one of those might be the most lucrative. Online selling is extremely competitive.