Use FormControl for Changing values in a List of Parameters?

Dera members of the community,

I have been trying to change values in a list. I have used FormControl for that purpose.

par1 = FormControl[Association[Thread[coefLabels -> 0]], 
  Thread[coefLabels -> "Number"]]

This gives me the chance to modify values, however, I do not know how to recover the updated values.
I am afraid this could be very simple but I do not how to do it.

Cheers

Jesus