How to limit rows until you need them

Hi,

I am creating a form which will be filled out and returned to me by many individuals. The reason I created this form was to uniform the informaiton I get from the multiple sources to simply my organization of the payments.

What I would like to do is only show a few lines of information and then possibly add a button that says "Add a line" which will insert a line that will be formatted exactly the same as that above it. So that my Subtotal and Total will keep formulating appropriately.

Additionally, when that is completed, is there a way to have a whole section inserted? For example if I wanted to add another "Job Details" portion to the bottom, if a company was working more than 3 project areas, is this possible? Maybe the button would say, "Add another Project Area." I don't know if either of these are possible but would appreciate the help.

Thank you!

Excel Help.xlsx

Does that have a way to add another line?

The issue I am having is that this form needs to be idiot proof-more or less- so that is why I wanted to add a button or macro maybe that would allow this to happen. I don't know if those are the correct actions to take, but that's my guess. Let me know what you think.