This has actually been asked a few times, after serious consideration I chose to exclude that option from this version.

Most retailers add linkable tracking to the order comments for ease of access and I felt adding to many fields to the form would just frustrate the end user (customer), also the reason I added admin options to not display all the fields within the form.

To recap, the additions already added to this plugin
1.) Admin controls to set all form fields as "Optional", "Required" or "Do Not Display" with the exception of the "Action Requested and Reason Text fields".
2.) Admin controls to show "Stores Address" or use a different "Returns Address" for the Success Output page.
3.) Success Output page Auto generates a RMA# (Order ID - Customer ID - Date) if customer is logged in and comes comes from the My Account > Order History Info page.
4.) Success Output page Auto generates a RMA# (Order ID - Date) if customer is not logged in.
5.) Admin controls to display error messages as inline or via messagestack.
6.) Auto updates Order Status in admin upon Success.
7.) Auto updates Returns Reason under Order Comments in admin upon Success.
8.) Adds a Request RMA Button or Link to the My Account > Order History Info page.
9.) Adds input field in admin for the Link text that you want displayed on the My Account > Order History Info page.
10.) Auto populates customer's information when logged in.
11.) Auto populates Order ID field if customer comes from the My Account > Order History Info page.