Remember, if you are an employer that outsources payroll you retain all tax roll tax liability responsibilities and remain liable for unpaid taxes.
So, take these steps to protect yourself if your business uses a payroll agent, enroll in the Electronic Federal Tax Payment System (EFTPS) and My Tax IL, so you can monitor whether the tax deposits are being made.
You should also ensure that all correspondence from IRS about payroll taxes goes to your address, not the agent’s. Use an IRS-certified professional employer organization, if possible. The Illinois correspondence is available on My Tax IL.