Thank you for joining this thread, @HKLCPA.

Some fields appearing blank on the 941 forms might be caused by the antivirus of your computer. To resolve this, let's turn off the anti-virus.

Once turned off, update again your QuickBooks Desktop (QBDT).

Here's how:

1. Go to the Help tab.
2. Select Update QuickBooks Desktop.
3. Click Update Now.
4. Tick the Reset Update and make sure that all categories are checked.
5. Tap Get Updates. 
6. Hit OK and click Install Now.

When the update is done, restart your computer and right-click the QBDT icon then choose Run as Administrator.

Once you're signed in, let's get the latest payroll tax table. 

Also, for additional information on how QuickBooks Populates the 941, you may read through this article link: Form 941.

Let me know how it goes by leaving a reply below. I'll be here if you have other concerns. Stay safe and take care always, @HKLCPA.