I have 4 lists:

Attribute List Task List enter image description here

and Project Tasks which contains Items (content type:Summary Task). When I add new Item in Project Tasks I need to add all Tasks (content type:Task) from my list TaskAttributeList automatically.

How can I do it?


I will strongly recommend you to use event receivers and not workflows unless there is a business process involved.

Event receivers are more reliable, and will happen instant while workflows might have a delay.

You did not specify what versions of SharePoint you are using, but I am guessing 2010 from your screenshots.

These might help get you started:

Event Receiver for List Instance Create an Event Receiver

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You can do it using Event Receiver or workflow. I would suggest Event Receiver.

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