First and foremost, I want to ensure that your software is up to date. We have released a new update today. Make sure it's up to date.
Since you cannot edit the formula cell directly, try these steps to troubleshoot:
Go back to the RRSP Profile section.
Temporarily delete your RRSP contribution amount and your HBP repayment amount (set them to $0$).
Continue to the next screen to let the software save that "zero" state.
Go back in and re-enter the numbers, starting with the total contributions first, then the HBP designation.
Ensure the amount you are designating doesn't exceed the total contributions made between March 2025 and March 2026. If you try to designate "Unused" contributions from 2024 or earlier as an HBP repayment, the CRA (and TurboTax) won't allow it, which can cause the math on Schedule 7 to break.
If you are using the CD/desktop version, go to Forms View (bottom left). Open Schedule 7 and look for the "hidden" worksheets. Sometimes, an entry in a background worksheet forces the line 10 value.
If the error persists, we suggest you contact our product support by phone so they can troubleshoot and investigate.
Thank you for choosing TurboTax.
