I found this by simply using "1125E" as my search https://proconnect.intuit.com/community/federal-taxes/help/entering-corporate-officers-compensation/...

In Lacerte, if you go to forms view, find 1125E, find a box or line you want to do input for and RIGHT CLICK on that line or box > Select "Jump to Input" and you will generally be taken to the input area.

You can also use Ctrl + F to begin a search while in the Detail screen. The 2nd item is search for a form. Unfortunately it will NOT find 1125E

Hopefully the 1st link will get you to the part of Screen 20 that opens up to Officer Compenation.