I'm here to help you get past this issue, @ljpa9.
If you changed the number of checks to be printed manually, it might not have fixed the problem as it could've been done in the check register. To rectify this, you can access the affected checks and manually update the check numbers.
![image.png image.png](https://quickbooks.intuit.com/learn-support/image/serverpage/image-id/96386i12408F4A7FE27375/image-size/large?v=v2&px=999)
It's important to note that although the check is voided, it will still be counted in the sequence and won't fall behind.
To help you print checks in QuickBooks Online (QBO), I've added some articles you can refer to:
You can always get back to this thread if you need further help with your voided checks and check register. We're always ready to help you out.