Greetings, @octopuswindowcle.

Thank you for reaching out. Let me help you in modifying the pay period in running payroll.

You can update the pay schedule on the Payroll Settings. Here's how:

1. Click on the Gear icon. Then select Payroll Settings.
2. Select Pay Schedules in the Payroll and Services section.
3. Select Edit next to the pay schedule you want to update or delete.
4. Update the pay schedule information.

For more details, you can review this article: Set up and manage payroll schedules.

Please let me know if you have further questions. Stay safe and enjoy your weekend!