Where in NextChapter: Additional Documents > Court Forms Library > Monthly Business Income & Expenses 

Once you have selected "Create" you will see a modal appear that asks for the monthly income and expense amounts. This information will save to this page. If you save the document and need to return to make edits, when you click "Create" the next time, the previously entered data will be in there.

Once you click "Save to Client Document Storage" you will be able to download your document from Additional Documents > Client Document Storage