The ready-made tables for your state and country are added when your company signs up. If they are missing (for example after changing the company's state), open Payroll, Tax tables, and press Add the ready-made tables for your state and country: Australian resident income tax and the Medicare levy; US federal and state income tax; Canadian federal and provincial income tax (with a Quebec version); or India's new and old tax regimes. Add any missing ready-made tables adds only the ones you do not have.
New employees start on the company tax tables. If there are none, the dashboard shows "Add your tax tables before the first pay run". You can also add your own table with brackets, an allowance and a tax credit. Check the tables with your accountant each tax year.