It would be most helpful (to you) if you could post:
The name of the App you are using
Screenshots of before the first form submittal (return) and then AFTER the next form is ready to enter.
Some Questions:
Is the app scriptable?
Is the structure of the second window/form different from the first?
After you submit the first form, does the window stay in place, or is it replaced by another window?
What would be ideal, if the data is not sensitive, would be to do a video capture of the entire process, and tell us what you are doing as you do it. Seeing/hearing the whole process is the faster, best way to get you a solution.