FSM WO task Form dates

[vs00884087]

Is it possible for me to set below dates in past. I got a use case where I need to put some sibling tasks in past since these are been completed in recent past its associated tasks are still work in progress.

Scheduled travel start

Scheduled start

Estimated end

[Joshua Chen FX]

(1)Scheduled travel start (2)estimated end are read only fields. 

I would not recommend customizing this. I am not sure what you are trying to achieve, your requirement is not clear. Have you looked at the ''actual'' fields?