My son has a T4A (box 042) for TY 2016 but not reported on his 2016 Tax return. How can he report his T4A for 2016?
Your son would have to do an adjustment to his 2016 income tax return to report the income from the RESP. This can be done online if he has a My Account with CRA or can be done on paper and mailed in to CRA. I have included a link with the T1ADJ form for your information.