I have been having the same issue with 1 employee for most of 2020. For 1 employee QuickBooks adds another Medicare Employee deduction. I talked to someone is support and after an hour told them I had to go. They were zero help. Reading all these threads I was hoping someone would have a solution without additional hours of work, but that appears unlikely. I was also hoping that QuickBooks would correct itself with the new year and starting off fresh. No luck. It did the same thing with the first payroll of the year. Any suggestions?