To ensure that you'll enter the correct phone number format when setting up payroll, it should be US number and be formatted with (xxx-xxx-xxxx).
I've attached the screenshot below for your reference.
Then, you can refer to this article to see an overview of setting up payroll in QuickBooks: Set up payroll. This also provides a checklist and helpful links to get you started.
Feel free to leave a reply below if you have other concerns with QuickBooks. I'll appreciate the opportunity to help. Stay safe and take care always.
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