Select field live() and then use the ->afterStateUpdated() method to set the value of the TextInput field (which you can also mark as ->disabled() like you have in your example so that people can't update the value)afterStateUpdated() - https://filamentphp.com/docs/3.x/forms/advanced#field-updatesSet, which you'll need for your example) you can inject into the afterStateUpdated() closure parameter - https://filamentphp.com/docs/3.x/forms/advanced#form-component-utility-injection