Hey there, rock and roll. Allow me to share some information on how to fix the printing problems in QuickBooks Desktop.

Since you've mentioned that you already print some checks yet you're still getting print check reminders, I suggest using the QuickBooks Tool Hub. Using this tool helps fix the common problems when it comes to printing. Also, please ensure that you have the recent update of this Tool hub for a better user experience. 

Here's how: 

Step 1: Download the most recent QuickBooks Tool Hub version

1. Close QuickBooks Desktop.
2. Download the most recent version (1.6.0.3) of the QuickBooks Tool Hub. If you've installed Tool Hub before, you can find out which version you have. Select the Home tab. The version will be on the bottom.
3. Open the file you downloaded (QuickBooksToolHub.exe).
4. Follow the steps on your screen to install.
5. Once done, double-click the icon on your Windows desktop to open the tool hub.

Step 2: Run the QuickBooks PDF & Print Repair Tool

1. Within the QuickBooks Tool Hub, click Program Problems.
2. Select QuickBooks PDF & Print Repair Tool. 
3. Print, email, or save as a PDF from QuickBooks Desktop again.

You can also refer to this material to learn other steps to fix printing problems in QuickBooks Desktop:  Fix PDF and Print problems.

Moreover, you can also browse our Community articles to see some related topics that may help in your future transactions. 

Let me know how it goes as you try fixing this matter using the steps above. Know that I'm always around to help if you need further assistance.