I just had my first client with a T4A slip showing, in box 197, the amount of the CERB he received in 2020. When I entered it, the T4A slip “Description” field remained yellow and the message said, “Slip for CERB and CRB is incomplete. Please review.” When I put a dummy amount of $1.00 on line 22 (Income Tax Deducted), the warning was gone. Of course, no tax was deducted on the CERB, only on the CRB.