What weight and balance form should I use for my checkride?
Use the same form you use every other time you go fly with your instructor.

If you're at the point of preparing for a check-ride and you have never had a weight and balance form before, you may want to sue your flight instructor (...kidding, kind of).

If I approach a new trainer-airplane for the first time, I find out whether someone has made a weight and balance form for the plane yet and ask for a copy.  If not, one can be created using the data in the AFM in Excel or other spreadsheet program.

I like to make mine fully-automated as much as possible for day-to-day usage, but they can still be filled in manually for the purpose of demonstrating the understanding to an examiner.

If you use LibreOffice Calc, you can download the one I made for the plane I use.  





If you try to open it with other software, it will look screwed up, but you can still get the idea.

The light blue shaded fields are the only ones that can have data entered into them.  The graph is created based on the weight data, and it automatically subtracts the fuel burn based on the flight duration.  So the two connected dots are the takeoff and landing C.G./Weight combinations.

This was all done from scratch using the AFM's data.  It takes some work, but it is worth it.  Your instructor should have something like this made already.