I can help you check if the paydate was successfully changed in QuickBooks Online (QBO), barbksforthowardapts.
You can log in to your QBO account and open the paycheck list to see the details of your payroll. To do so, please follow these steps:
If you need some corrections, I recommend contacting our QuickBooks Online Payroll Team. They can help correct your payroll records in a secure environment.
Also, I've added this article to help you get ready during tax season: QuickBooks Online year-end guide and checklist.
Feel free to leave a comment below if you need anything else concerning payroll. I'm always glad to help you.