Helping you fix your check alignment is pretty easy, tuckermarion. Let's get started.
Here's how to update the Adobe:
- Launch Adobe Reader or Acrobat.
- Choose Help, and then Check for Updates.
- Follow the steps in the Update window to download and install the latest updates.

If the problem continues after the update, let's repair your Adobe Reader. See the steps below.
- Close Acrobat/Reader and all open web browser windows.
- Hit the Start button at the bottom left of your screen.
- Type Control Panel, then press Enter.
- Click Programs and Features.
- Select Acrobat or Adobe Reader, then click Uninstall/Change or Modify.

- In the Setup dialog box, select Next.
- Tap Repair, then Next. Select Install.

- When the process is complete, select Finish.
- Restart your computer.
Once done, log back into QuickBooks Online, do a print test, and check its alignment. You can get more information about this in the following article: Configure your print settings for printing checks. On the same write-up, you'll find a link to get a guaranteed check that's compatible with QuickBooks.
Please update me on the results in the comment. I want to ensure everything is working aligned for you. I'm here to provide further assistance and insights. Have a great day!