To generate Local Form C-1 in TXSB, you will want to enter your case, and go to Additional Documents > Forms Library. Here, you will scroll to the bottom and select the download button, or eyeball button for "Schedule C-1". For the download button, a copy of the form will open and you can save this document to your computer. The saved document will be blank and allow you to enter your numbers manually.
For the Eyeball option, you will select the eyeball icon, and a preview of the form will appear for you. You will then select the download button in the top right of the screen and it will save a copy of the pre-generated document for you to your computer.
Once saved to your computer, you can upload this form back into your case within NextChapter by going to Additional Documents > Client Document Storage. Here you can select "Add File", and a window will pop up to select your saved document. Once selected, your saved document will appear within your Client Document Storage and be added to your case.