A pay period refers to the tax period in your payroll, for example, 1-12 for a monthly payroll or 1-52 for a weekly payroll.
You don’t need to create pay periods as these will automatically be created when you complete the first file import into your Gateway employer website.
You can edit pay periods by clicking on ‘Edit schedule’.
Please make sure you double-check that the pay period start date matches the values in the file you’re importing.