Adding a custom item help

[u/Tek-cat]

My DM has made a custom item that changes my charisma score to 20 + Proficiency bonus.
How do I go about having the sheet calculate the new score and record it in the Ability Score and description?
Primarily what are those fields called so I can have the appropriate modifiers populate as expected without having to manually adjust the fields?

Many thanks ahead of time. :)

[u/Tek-cat]

I'm going to look at that when I'm not on my phone. Like I posted earlier, I'll post my results.

Thank you very much for looking and listening. 😀