Form W-9 is not a form which you report on your tax return, so there is no page in TurboTax to enter f-MISC.orm W-9.
If you ever find yourself filling out a Form W-9, it generally means that a
business or person who is paying you money needs your Social Security
number so it can notify the IRS of the amount. The W-9 is used in a wide
range of payment situations, but most commonly, taxpayers fill them out
when they are working as a freelancer or independent contractor rather
than an employee.
Information that you give on Form W-9 will be used by the payer to issue you tax forms such as form 1099-MISC.
Please read this TurboTax article on Form W-9:
https://turbotax.intuit.com/tax-tips/self-employment-taxes/what-is-irs-form-w-9/L2f51WOD7