Here in Denmark the last test after achieving SVR is done 1 year post treatment.
One week after finishing TX. Then at 12 weeks and/or definitely at 6 months. Then at one and two years. After that no reason to test unless you had a risk / exposure. Good luck
i don't think you need more testing after being SVR , the chance of it coming back is too little and it is expected only if some big health threatening problem occured like AIDS or cancer