When updating all of the previous transactions in my payroll settings, it says too many transactions but I can only adjust the start date with no end date?

Hello there, vencilj.

Let's update your existing transactions and ensure your data remains accurate in QuickBooks.

First, can you share and verify if your book is already closed or not? A closed book can be the reason why you received that error message and cannot update your existing transactions.

Updating previous transactions will only work for non-bank accounts. For bank accounts, we're unable to update them. No worries, we can handle them using journal entries. In doing this task, I'd highly suggest consulting your accountant to ensure your book will not mess up. We can visit this article for further guidance: Learn how to record journal entries in QuickBooks Online.

On the other hand, if you haven't closed your book yet to prevent changes to past transactions, I recommend performing the steps below to isolate this unusual behavior.

We can use any of these keyboard shortcuts to open a private/incognito window:

• Google Chrome: Ctrl + Shift + N
• Mozilla Firefox: Ctrl + Shift + P
• Safari: Command + Option + N

If you can do it successfully, we'll need to clear your browser's cache. If it persists, let's use other supported web browsers in QuickBooks.

• Delete browser cache and Intuit-specific cookies.
• System requirements for QuickBooks Online. 

And, yes, the system will only let us change the start date. QuickBooks handles your data up to the recent transactions. If we want to make further changes to the period or end date. We can reach out to our Payroll Support Team by going to the Help icon> Contact us. They can assist your further with this. 

Feel free to check these articles for more tips and information about running payroll reports and managing your payroll settings:

• Change your accounting preferences in QuickBooks Online Payroll.
• Run payroll reports in QuickBooks Online Payroll.

Don't hesitate to add another post if you have concerns about modifying details from accounting preferences and anything related to QuickBooks Payroll. I'm here to help you anytime.