It seems the 2024 version of turbo tax is not calculating the CPP pensionable earnings. Therefore it needs to be entered manually. Until it is entered turbo tax will show a refund of CPP contributions. Therefore the amount owning or refund due is incorrect unit box 26 entered.
I had the same problem as you. I entered the values from my last pay stub and thought I was getting a refund. Then I entered the values from my T4 and ended up disappointed. It took a couple hours going through the forms with different values, to figure out why.
I can think of no reason why turbo tax can't do the CPP pensionable earnings calculation, so it must be a bug!
