If you're an employee, your employer will give you the form. To do so, you are going to require a 1099 form from every company which you've completed contract work. Now that you've completed all the forms, you have all of the information you will need to finish the 2019 W4 Form on Page 1. Tax forms can be difficult to complete, especially the first couple of times. The W-9 Tax Form is just one of the simplest reports to complete. W-9 Form is a significant document used to detect employee's tax identification number.