Thanks for taking the time to reach out to the QuickBooks Community for support. I hope you're enjoying the day so far.
I'm happy to lend a hand with changing your payroll date. You can use the steps I've included below.
Go to the Payroll menu and then select Employees.
Choose Run Payroll.
Click Preview Payroll.
On the Preview Payroll page, select the Back button.
At the top of the screen, change the paycheck date. Select the Preview Payroll button to complete the check.
Choose the Submit payroll button to submit the paycheck.
I also wanted to mention that QuickBooks Online has a fixed pay period that depends on your setup. After you edit the pay date manually, it'll go back to the set schedule on the next pay period.
Feel free to check out the help articles I've included below that cover more information about changing payroll due dates.
Please don't hesitate to let me know if you have any questions or concerns. I'll be here every step of the way. Take care, and have a wonderful day ahead!