how can I restore my QB on line pro to a earlier date and erase my changes made in 30 days

It's a pleasure to have you here today, @daveb2. We'll share details about restoring or reverting your data to the previous version inside QuickBooks Online (QBO).

Before anything else, know that we want to ensure we're providing accurate information to help you get through your current situation. If your subscription is QBO Plus, the option to restore is unavailable. If you have exported some of your original data before you've made changes to it, you can import them back to your company. But before doing so, you may want to check if you're eligible to start with a clean slate in QBO to manage incorrect recordings. For more details, please see this page: Delete your data and start over in QuickBooks Online.

If you're using the Advance version, you have the option to restore your data to their original version. For more details, please see this page: Back up and restore your QuickBooks Online Advanced Company.

Moreover, here are some articles to help you extract and review data you have inside QBO:

• Export reports, lists, and other data from QuickBooks Online.
• Run reports in QuickBooks Online.

If you need further assistance managing data or changes inside QuickBooks, know we're always ready to help you again. Feel free to visit us anytime so we can get back to you. Have a good one.

@daveb2 

What @Kurt_M  appears to be trying to say, without actually saying it is, "No, you can't."