Most medical providers recommend abstaining from alcohol when you have hepatitis C or any other liver disease. We know that heavy alcohol use can damage the liver. Light to moderate alcohol may also injure the liver, but the research is less clear. The risk is affected by the liver’s condition and an individual’s ability to metabolize alcohol. For instance, men tend to metabolize alcohol better than women can.
As for an occasional glass of wine, most medical providers would discourage it. It may be fine if you have no liver damage, you aren’t taking medications, the amount is less than 5 ounces of wine and that “occasional” truly means a few times a year. Your healthcare provider is the best person to discuss this with.