Employee Expense Claimed without T4

A customer NETFILED his return last year and come regarding reassessment. He has no T4, but he claimed T777 and GST370. Net, according to the NETFILE software, he should get a big refund. I am using taxcycle to test, seems even no T4 entered, I can still claim T777 and GST370. Is it right that even I have no employment income, I can still claim expenses and GST370?

If there is no employment income, there is no income to deduct those expenses from…

It is right, I am just try to test whether the software will do some restriction on this kind of thing.