The amount owing isn't changing because the software is still applying the full annual exemption to your single month of work. To fix this, you must find the Schedule 8/CPP optimization screen and locate the box for 'Number of months of CPP-eligible earnings. ''Manually change that '12' to a '1.' This forces the software to prorate your exemption and should adjust that 'amount owing.

Ensure to follow these steps:

In TurboTax Canada (Online or Desktop), follow these steps to reach the month-adjustment screen:

On the T4 Screen: * Set the "CPP/QPP Exempt" dropdown/checkbox to "No" (this clears the Box 16 error).

Ensure Box 26 (Pensionable Earnings) matches your Box 14 (unless you have specific non-pensionable benefits).

Navigate to the CPP Summary: * In the left-hand menu, go to Tax Topics > Pension Profile (or search for "CPP" in the Find/Search tool).

Look for the section titled "CPP/QPP contributions on self-employment and other earnings" or "Schedule 8."

The CPT30 / Months Section:

You will see a screen titled "CPT30 - Election to stop contributing to the CPP."

Select "Yes, I filed a CPT30 with my employer."

Enter the date the election became effective (the first day of the month after you gave it to your employer).

The "Number of Months" Override:

There is a specific field on the Schedule 8 / CPP screen (or sometimes just after the CPT30 entry) that asks for the "Number of months you were required to contribute to CPP."

Change this number from 12 to 1. 

If you've completed all of that. Please private message me the screenshots so that I can forward them to the assigned department for further investigation.

Thank you for choosing TurboTax.

That is a great answer thank you; however, two problems.  To the left of my screen there is no "Tax Topics" and when I go to forms there is no Schedule 8.  I am currently on the telephone with Turbo Tax screen sharing and they cannot find these either.  

In EasyStep mode, you can search for "CPP" using the Find tool.

In Forms mode, you can search for "Schedule 8" by clicking on the Forms button.

Please send me a screen shot of Schedule 8 in the forms because I nor the turbo tax person I am on the telephone with can find it.

It's a long form, but this is the top:

This is online not desktop.

@tepmurt1 If you are using TurboTax Online, then you will have to wait until NETFILE opens on Monday, February 23, 2026 at 6:00 a.m. (Eastern Time). Then you can print out the archive of your return and view Schedule 8. 

I am using Turbo Tax Deluxe 2025 and none of the Schedules that you are suggesting are included nor can I add them in forms.

Ok I will wait until February 23, 2026 to see what I can find...... an hour back and forth here in the community and more than 2 hours on the telephone with Turbo Tax...... It's been a frustrating day!  Do I recommend Turbo Tax ...... I will see after February 23rd!