Transition Change/Incident
When an issue transitions through its workflow, we can add the following post functions:
TOPdesk: Transition change
TOPdesk: Transition incident
These post functions can be used to change the status of the linked TOPdesk change/incident. We do this by adding a post function to the desired workflow transition.
An example for a change: You want to set the status of a TOPdesk change to ready to start when the Jira workflow transitions from Backlog → Selected for development. Add the post function to this workflow transition and select Change status: Ready to start. When the issue is transitioned to the status Selected for development, the status of the linked change will be set to "Ready to start".

Select the change status in Jira