During reconcile in QBO I realized I printed the wrong check number. Can I just edit the ck # in the edit field?

Hi there, Sandra722. 

Thank you for reaching out to the Community. You can edit the check number by open the transaction through the Expenses' page. 

Let me show you how:
 

1. Go to Expenses from the left menu, then Vendors. 
2. Locate the name of the vendor, then click it to open the profile.
3. Find the check and open.
4. Enter the correct check number.   
5. Click Save and close.

Make sure to uncheck the print later to modify the check. Once done, you can reprint the check again with the correct check number.  

I'm adding these articles for future guide:
 

• Print a check in QuickBooks Online
• Configure your print settings for printing checks

You can always count on me if you have other questions about checks or anything else about QBO. I'm always here ready to help you anytime. Take care and keep safe!