Most of the data entry jobs are scams. I would steer clear of them completely.
There ARE legit ways to make money from home, but it isn't easy getting started. You really need to do some reading and choose a course of action. Once you know what path you want to take you need to stick with it faithfully for quite some time before you see results.
Some of the best options for making money from home are...
1. Build a niche (topic) website about a particular subject that you are already knowledgeable about or very interested in. You can make money from affiliate marketing, Google Adsense, etc.
2. Write articles around topics that relate to affiliate products that you are promoting. You usually still need some type of site to send the interested people to first before sending them on to the affiliate site. Sometimes a Squidoo lens, blog, or Hub page will do for that purpose.
3. Do some freelance writing by bidding on projects at elance.com or getafreelancer.com etc. Another option is Amazon's Mechanical Turk. They always have a bunch of small tasks that need doing. The pay isn't that great, but it is something to get you started until you can invest in a proper online business.
Hope you find something that suits you. Just don't waste your money on any of those data entry sites. They are an exercise in futility and frustration.

Blessings,
Angie