Hello there, @userkuhnfarms.

Let me help you recreate the paychecks in QuickBooks Online so you can change the date.

Here's how:

1. Click Payroll, then choose Employees. 
2. Tap Run payroll. 
3. Enter all the necessary information.
4. Select Preview payroll, then Submit payroll. 
5. Print the paychecks by clicking Print pay stubs, then Finish payroll. 

To learn more about what can and can't be edited or deleted on a paycheck in QBO, you may check out this article: Change an employee paycheck. 

Please feel free to leave a message to this post if you need further assistance. I'm always here to guide you. Enjoy your day!