How do I change the company address on the paychecks? As far as I can tell I have changed the company address everywhere else. My payroll liabilities forms are correct.

Let's check if you've updated your work location, sharon35.

QuickBooks Online Payroll uses the primary work location when printing paychecks. We can find this address in the payroll settings and update it from there.

1. Go to the Gear icon and select Payroll Settings.
2. Under Business Information section, click Work Locations.
3. Click the first address that has (Primary)* on it.
4. Update it, then click Save.

We can now reprint your paychecks. You can also check this article if you have printing errors: 

Troubleshoot printing paychecks, pay stubs, and forms.

Post again if you have more payroll-related concerns. Wishing you all the best!