There are companies who will pay you to do data entry on behalf of their clients, and will hire home-based data-entry clerks to enter their data. One such service is Axion Data Entry Services.
Once you sign up, you’ll have to take an efficiency test to show your skill level. They also charge a small administrative fee to sign up. Work may not always be available, but it could be an easy, flexible way to earn money if you’re a good fit. They pay anywhere between $5 to $9 per document.
This is an area where you’ll have to be careful not to get scammed. Many “data entry” searches will take you to “employment” sites which make it look like they are a free job listing site, but then ask you for a credit card.