Form 3922 information

I have a Form 3922 for 2019, and sold my ESPP stocks in 2019.

 

I also received a 1099-B for these sales and have imported this into TurboTax.

 

I have read that the only time the information in 3922 is used is when the cost basis in 1099-B in not correct. 

 

My questions are:

1. Is there any other use for Form 3922 aside from what I stated?

2. How do I use Form 3922 to check against my 1099-B as to whether or not the cost basis is correct?