My remaining losses carried forward to 2025; -$252,288 are wrong. They should be -$124,644. How do I correct this error?

Looks like it got doubled.   Did you manually enter the carryover from 2023?  It probably automatically transferred it from 2023.   Go back and delete the 2023 carryover.  

Schedule D doesn't actually show the carryover amount. To find your  Capital Loss Carryover amount  you need to look at your  return schedule D page 2.  Line 16 will be your total loss and line 21 should be a max loss of 3,000.  The difference between line 16 and 21 is the carryover loss for next year.

There is also a Carryover Worksheet showing the carryover from the prior year and the current amounts.  Then there is also the Capital Loss Carry Forward worksheet showing the amount transferring over to next year.

In the Online version you have to save your return with all the worksheet as a pdf file to your computer to see Schedule D and the Capital Loss Carry Over and Carry Forward worksheets.

In the Desktop program you can go to Forms and find it in the list in the left column.

The experience that you described is in the process of being resolved.  Take a look at the following TurboTax help article for an opportunity to register your email address to receive updates: Why is the capital loss carryover screen showing incorrect calculations?