I personally just put the qualified foreign dividends from K-1s into one of the Screen 12 inputs, because it acts as an {A]dustment there, rather than an [O]verrride. Lacerte is entirely willing to accept nonsensical input, like "I have $30 of ordinary dividends, $29 of which are foreign source, and $30 of qualified dividends, $900 of which are foreign source" in the Foreign Tax Credit input section of Screen 12. Crtl+E means I can enter one line for the part that actually belongs to those dividends and one for the K-1 piece, and using the first Screen 12 item that's linked to the appropriate 1116 makes it easy to find the input.

I try to save my overrides for things with no workarounds, because being able to tie Lacerte's calculated result to my workpapers is a good quality control practice.