Medicare and Social Security taxes combined are referred to as FICA (Federal Insurance Contributions Act).
On a personal note: the process of filing federal taxes is confusing. Don’t worry if you mess up. While working at a previous job, I was responsible for the office payroll. I paid the office’s federal employer tax on a quarterly basis.
When I hired my first employee for my own business, I assumed that the same rules applied. To my surprise, I received a notification from the IRS one day telling me that I owed several hundred dollars for each of the months that my taxes were not paid. Each month? I was surprised to learn that the payment was due monthly. They notified me of my lapse seven months into it.
As you can imagine that the amount I owed was steep. I did the only thing I could as a small business owner with a limited budget. I contacted the IRS, admitted my mistake and begged for forgiveness. They fees were waived!
So don’t be too hard on yourself if you make tax mistakes. We all do it at some time or another. And if you do make a mistake, let the IRS know. They are more forgiving than you might imagine.