About a week after the site visit, someone from Nevada will contact you to discuss your design layout and see if you have any questions. The design layout will show a top view of your house with the placement of your panels. This layout will also tell you how big your system is in kW. You can choose to accept the layout or ask them to change some things. For me, I accepted the layout, but wanted some equipment swapped out. They were going to put in two Delta inverters but I stated that I wanted a Solaredge invert and wanted power optimizers. They made the change and I accepted. After that, they will put several documents in your tesla account which you will need to sign. Once you do, then you wait while they get in touch with your electric company, city, and county for permits. This is the stage where I am at right now. They got in touch with my electric company already and are now talking to my city to get a permit.
Hope that helps. Sorry if my grammar is bad, typing on my cell phone.