After you file
If you disposed of an activity in 2023, you need to recognize the associated passive losses in that year. So, you need to amend the 2023 return in that case.
When you enter your rental activity in 2024, you will see a screen that says Do Any of These Situations Apply to This Property? and you will check the box to indicate you have carryovers:
On the next screen you will see Passive Losses From Prior Years, on which you can enter the correct carryover losses:
