No, you don’t need an amount in Box 33 on your T4. You can use a portion of the individual's $1,200 standard amount.
On the T2222 - Northern Residents Deductions form, Step B, Chart B uses the lowest of amount from column 3, 4, or 5 for each person/trip to determine the amounts used in the total. Column 3 needs to be either your travel benefit (box 33 if it’s for a medical trip), or the portion of the individual's $1,200 standard amount for the trip. So, if you don’t have anything in Box 33 on your T4, then you need to use a portion of your $1,200 standard amount. If you have already used up all of the $1,200 on other trips, then column 3 will be zero, which will be chosen for the total.
