Any business with employees must withhold money from its employees' paychecks for income and employment taxes, including Social Security and Medicare taxes (known as Federal Insurance Contributions Act taxes, or FICA), and forward that money to the government. A business that knowingly or unknowingly fails to remit these withheld taxes in a timely manner will find itself in trouble with the IRS.
The IRS may levy a penalty, known as the trust fund recovery penalty, on individuals classified as "responsible persons." The penalty is equal to 100% of the unpaid federal income and FICA taxes withheld from employees' pay.
Any person who is responsible for collecting, accounting for, and paying over withheld taxes and who willfully fails to remit those taxes to the IRS is a responsible person who can be liable for the trust fund recovery penalty. A company's officers and employees in charge of accounting functions could fall into this category. However, the IRS will take the facts and circumstances of each individual case into consideration.
The IRS states that a responsible person may be:
The IRS will target any person who has significant influence over whether certain bills or creditors should be paid or is responsible for day-to-day financial management.
If your responsibilities make you a "responsible person," then you must make certain that all payroll taxes are being correctly withheld and remitted in a timely manner. Talk to a tax professional if you need to know more about the requirements.