I had several T4's but did not see where to enter them so just entered the total income. What should I do?

Once you enter a T4, you can scroll down to find a button that says add another T4.  If you actually have the standard installed version, you can click on the forms icon, type in T4 and a screen comes up where you can enter multiple T4's.

You should delete your current T4 entry.
Then add each T4 separately on as many instances of the entry page as you need.
If you have 4 T4s, you will need 4 instances of the entry page, one for each.
Enter all data from each T4 separately.