When you wear armor for which you are not proficient, you roll with disadvantage on all ability rolls, saving rolls, or attack rolls involving Dex or Str. PHB pg 144
The interface currently marks skill checks, and saving throws with a D symbol to show that when wearing said armor, you have disadvantage.
However the attack entries, and straight ability checks do not get marked appropriately.
When you wear armor for which you are not proficient, you roll with disadvantage on all ability rolls, saving rolls, or attack rolls involving Dex or Str. PHB pg 144
The interface currently marks skill checks, and saving throws with a D symbol to show that when wearing said armor, you have disadvantage.
However the attack entries, and straight ability checks do not get marked appropriately.
I don't think the character sheet currently supports any modifiers on the straight checks. Maybe soon.
I think attack rolls should be able to show disadvantage though.