Link to the IRS online tax calendar where you can view due dates by calendar month for filings and tax payments.

Link to e-Verify where employers may confirm employment eligibility for employees.

Link to IRS Publication 1779, which provides guidance as to whether an individual is considered an employee or independent contractor for federal tax purposes.

Link to the Electronic Federal Tax Payment System (EFTPS), where you can pay any tax due to the IRS. 

Link to the IRS website where you can make payments using your bank account, a credit or debit card, or the Electronic Federal Tax Payment System (EFTPS).