Growing Expense Report

 For the "Growing List" part, I recommend using an editable list view. In the SmartForms designer, I suggest creating 2 "Item Views" (for your user data and page footer) and one "List View" for the user entered part. Then create a new Form and drag these three views onto it. That will give you a starting point, and we can then work through the details of getting everything working together.

There are a couple of different approaches here, but in the rules where you kick off the workflow, part of that action should have a place where you can map data fields on the form to data fields on the workflow. Depending on what you want that data in the workflow for, that may not be the best approach.

I usually like to save my form data into a database using SmartObjects and then loading that data back in when I need it on the workflow or on the next form in the process.

There is an advanced expense claim tutorial on help.k2.com that will include adding new items to an editable list view and saving them.  You can find that tutorial here.

Wanted to thank everyone for the help. I used the walk through and other comment on this post to make mine.  Figured out why my information was not passing to the workflow steps.  After making the workflow I had to go back to the form and move create workflow rule up above my clear webpage step .