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Hello there, @farrell_kongit.
Thanks for visiting the Community. To update the information on your W-9, click the Gear icon as soon as you logged in to your QuickBooks Self-Employed (QBSE) account, then go to the Tax Profile section.
For future reference, read through this help article: QuickBooks Self-Employed - Annual taxes guide. It'll guide you about to do's for January to April tasks.
Message here again at any time should you have more questions. We're always around here to attend your needs.