On a Resident's Documents tab, you'll see the New Documents menu on the righthand side:
When you click on any of the document types in that menu, you'll be taken to complete the task. For example, if I clicked on Identification and Emergency Information, I'd be taken to this screen to start filling out the form:
When applicable, it will also be added as a task to the Resident's Task tab. You can then share it just like you would any other task!
