Is there anyway to turn off the auto fill option for check numbers? I've discovered that Quickbooks has incorrectly recorded all of my check numbers.

Hi there. QBO automatically places the transaction numbers unless you turn on the Custom Transaction number feature and manually entered one in. The option allows you to assign one cheque number and the rest of the sequence follows.

You can enable/disable the feature in the Account and Settings page. Here’s how:

1.    Go to the Gear icon and select Account and Settings.
2.    Choose Sales in the left navigation pane.
3.    Pick the pencil icon in the Sales form content section.
4.    Check the box next to Custom transaction numbers.
5.    Hit Save and then Done.

For more details, refer to this article: How to change the invoice number on sales forms and other transactions.

Now, you can create a cheque and manually enter the transaction number. Here’s how:

1.    Click on the Plus (+) icon and select Cheque.
2.    Choose a payee.
3.    Enter the number in the Cheque no. field.
4.    In the Account details section, fill in the necessary fields.
5.    Once done, click on Save and close.

The steps above should get your cheque numbers back in order. Don't hesitate to reach out if you have further questions. I'm here to steer you in the right direction. 

Enjoy the rest of your week! :)