Seniors and students

Weirdly last year he was not taxed on it.

 

He was paid out a 3800 amount which then the government claimed back (due to error) which makes it to zero.

 

I am basically just filling OAS and T4A P (pension) for him in the province of Quebec.

 

I somehow remember previous year we have some deduction for his provincial with medication, is that still applicable? 

 

Is there any way to reduce his 720 amount owed?