I want to understand if bulk import of Task and subtask is possible in a single upload inside a proj

[Tulika Agarwal]

A csv file containing task and subtask with in that and provision to upload the template altogether . Also Add Approver feature is not there inside the tasks ?

[Nic Brough -Adaptavist-]

Welcome to the Atlassian Community!

Yes, this is possible.

You can define an approver in the CSV import file (as long as your project implements approvals).

Task/subtask is a bit more complex.  Your CSV needs to include two columns, one of which will not be imported.  It is easier to explain with a very simple example file:

Summary	Issue type	Key	Parent
Alice would like a jaffa cake	Sub-task	aaa	bbb
Bob wants cake	Task	bbb
Charlie is bored	Task	ccc
Dave would like some cake	Sub-task	ddd	bbb
Edmund would like to tell Baldric that he is an idiot	Task	eee

If you import this file, you'd get three tasks, with two sub-tasks under "Bob wants cake".  Each issue will import "key" as the "external issue id", but the parent field will be lost.