Let me guide you in updating your personal W-9 form in QuickBooks Self Employed (QBSE).
Updating personal details in the W-9 form ensures accurate records for tax reporting and compliance before your employer or client submits your 1099-MISC to the IRS:
Sign in to your QBSE account.
Select the Settings (⚙) icon in the upper right corner.
Choose Tax Profile.|
Make the necessary changes to your W-9 information.
Once done, select Save.
These updates will automatically be reflected for your employer or client in QuickBooks Online. Also, it's best to notify them directly if you've done making updates.