Hepatitis C virus (HCV) doesn’t automatically qualify you for disability, but if HCV-related symptoms interfere with your ability to work, then you may qualify. Start by talking to your medical provider, who will likely rule out other causes for your fatigue, such as thyroid problems, sleep apnea, depression, etc.
Check to find out what sort of disability for which you qualify. You may have disability insurance through your employer, or need to seek assistance through Social Security. The process may be overwhelming, and it may help to consult with a disability counselor or attorney. The HEP Forums are a good place to talk to others who have been through this process.