Creating an approval based application, stuck

Creating an approval based application, stuck

I want to create a simple application, which'll do following-:
1. Users will submit their expenses for reimbursement.
2. Manager will approve or reject or request more information
3. If expenses are rejected OR manager needs more information, then comments should be added
4. Submitter will be notified of each status update

-- I created a user hidden dropdown field called status which has values of Pending (default), approved and reject.
-- I created a comment box field and made it hidden in form action --> on add --> on load, and then kept it to show/default for On Edit in form actions
-- Scripts-: Send acknowledgement email on Success to submitter + his manager
-- Once manager updates the status field, send the email to submitter

Above all works fine

Now - Challenge-:

-- When manager rejects or need more information, he can put comments in the comment box as its available on edit, but I want to send email to submitter with the comments along with a link to the application, which is ok too, but it sends the application link which leads submitter to new form where he'll need to fill all data instead of just the comments to provide more information to his manager.

any help will be appreciated.