When paying liabilities via E-Pay in QuickBooks 2014, by default the liability check's check number field will say "To Print" with the "To be printed" checked field grayed out, checked off, and unselectable.
This issue has been resolved in the latest release for QuickBooks 2014
Update to the latest release:
Go to the Update to the Latest Release web page.
IMPORTANT: Make sure your product is selected. If not, click the Change link and select your QuickBooks product.
Select and follow the instructions for one of the update options: