You could do this for attacks: In your attack, check mark the "extras" so that they are on and then enter "{{?{Roll|Normal,* *|(Dis)Advantage,roll2=[[d20cs>20 + @{pb}[proficient] + ANY BONUSES YOU WILL HAVE]]}}}" in the freeform field. This will prompt for advantage/disadvantage whenever you roll that attack and do the appropriate output. You can do the same thing for saving throws, skills, ability checks and what have you via the "attachers" section in the settings tab. EDIT: The sheet should be set to normal rolls. otherwise you will wind up with a (dis)advantageous roll in r1 and a normal roll in roll 2. EDIT2: You can use the attachers section for the attacks too, but then you will be using the same bonuses for all attacks, which is probably not what you want.