Solved
In previous years, I have never had to enter the date of disposition.
The 2024 T5008 requires a date of disposition due to the new capital gains rate that was supposed to apply to Capital Gains after June 24, 2024. Even though the new capital gains rate is not going into effect this year, the requirement is still there.

Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.