How do you add an attachment link to an approval task form

There are a few ways to combat this. I would first recommend not to provide an attachment ability on the task. Instead the item the workflow is running on could be a document, or an item with the attached document for the approver to review. If the document is not available when the workflow starts, then possibly provide a To Do task, or Request Data, and instruct the appropriate person to attach a document to the item. It would be simple to provide the correct link there.

If you provide the ability to attach documents to tasks, you are at risk of losing data. Tasks are often deleted and can be automatically deleted by timer jobs. By default, SharePoint runs a daily Workflow Auto Cleanup job to permanently delete workflow instances and related task entries that still exist 60 days after a workflow is completed or canceled. Workflow history items themselves are not deleted, but the entry point to view them on the status page for a particular instance of a workflow will no longer be available. If you attach documents to tasks, you will eventually lose the data which can be problematic.

Instead, attach it to the Item the workflow is running on. To do this, simply provide the edit link to the item using Common variables. On this form will be the attach item ability (if it is enabled for the list).

Yes, if you attach a document using the List Item Form, the item has the document/attachment and the workflow can interact with it, and also will be persisted with the list item.

Yes, you can add a hyperlink control and have it default to the item url using references in the Common tab. To change to edit url have {site}/listname/editform.aspx?ID={itemid}

I figured it out!  I had to use the label control on the task form to find the dynamic hyperlink ability.  Thank you for sending me in the correct direction.

Christine Guyett​, I think a great place to start reviewing that process would be here -> Workflow to copy attachment files from Task List item to List item

Hello 

I need some new attach file post from nintex task form to Sharepoint List. the action is we can do?

Please give some advice .

Thanks

Tharsan.