You will need to submit a request to this email or reach out using the Support->Chat feature and ask to make changes to your tax form. Veryable will then reset your tax form to allow you to make the necessary changes. ***Please note: removing this prerequisite will prevent you from being able to bid until you fill out a new copy.***
Those wishing to file with a certain level of withholding or wanting to claim deductions can do so when filing their taxes. Because taxes are not removed from payouts, you do not note deductions/withholdings anywhere on your W9, and it is handled when your remit your taxes.