2 T4 slip with same employer but 2 different business number. One earning is $24 K other one is $10k. They only dedcuted federal tax on my $24k. now I owe CRA? Help pls!

[miel26]

Here's my situation. Hope you can help me.

Total salary: $34 K

First T4: $24 K   Second T4: $10 K

I'm working under the same employer but 2 different department. Payroll is separate. I get more hours than the other dept. I talked to my employer about it and she said I don't have to worry about paying anything because they're deducting what is needed. Now I'm surprised I owe CRA $2K ?!!! I noticed on my 2nd T4 ($10k) they only deducted $ 78.50. Was it supposed to be more than that? The other T4 i have is fine. My understanding now is it looks like I worked 2 different jobs and my employer was not deducting much on the other department. Please enlighten me....

[Delphision · Accepted solution]

It looks to me that you are absolutely correct.  Your employer did not take enough deductions off.  You will have to pay the additional tax.