Why is it asking me for other information about my spouse besides their total income? It’s asking me for things from 2024 but he has not done his yet?

You can put in an estimate for now and then enter the correct amount before you file.

Line 23400 less Line 23500 equals Line 23600. So, if your spouse didn't have any social benefit repayments, then Line 23400 is the same as Line 23600. Line 23400 is not on the detailed summary; you will see it on your T1.