Field and form rules - actions - custom script

Field and form rules - actions - custom script

Hi,

I'm trying to find a way to make an adjustment to the "Start Date" field on a service request form.
I would like to add a custom script so that it will subtract lets say, 10 days from whatever date the requester sets as the start date. That way the technician can get a headstart.

In addition to that, I would like the subtracted days to be different based on the ticket priority value. If it's high priority, we get a bigger headstart.

Does this sound like the best way to approach this scenario?

Thank you!

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