If an employee needs to submit a revised W-4, someone with "Edit: Startwork Templates" Permissions can build a Special Packet that contains only that form and share it with the employee.
When the employee receives the Special Packet, they will be prompted to review and update their W-4 information and submit the form.
For detailed instructions on how to do this, see: An employee needs to receive additional Startwork / a new form. How can I send that in TiM?
NOTE: Currently in TIM it is not possible for an employee to submit forms without production’s involvement. Production must share a packet with a user first, to allow the user to submit any Startwork.
For more information regarding the 2020 W-4, please visit IRS.gov.
Also see: How to complete a 2020 W-4 in TiM