Importing Tasks and Linking them to Product Backlog Items

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Hi
I have imported my Product Backlog Items using the Excel ‘Team’ add-in and they appear in Urban Turtle as expected. My Scrum team has a set of standard tasks that matched the definition of done and I would like to import these standards tasks using the ‘Team’ add-in. The problem is I have no idea how to link a task to a Product Backlog item using a query and the Excel ‘Team’ add-in.

Does anyone have any idea I can import tasks and link them to a Product backlog Item?

Many Thanks
John