The Electronic Federal Tax Payment System (EFTPS) is a free service from the U.S. Department of the Treasury. All federal taxes can be paid using EFTPS.
Here is the guide about how to enroll this system and make the tax deposit by yourself.
How to Make Federal Tax Deposit Payment Using EFTPS Site
If you hire third-party payroll service providers, you should monitor deposits made on your behalf for accuracy to ensure the third-party payroll service provider makes accurate and timely federal tax deposits.
Please watch this video from IRS.
Monitoring your outsourced payroll duties on EFTPS