Form 4797?

Thanks. So the oil lease would be sale of non depreciable asset? How is the basis determined? 

Schedule C = working the operation as a business. So, is he still Operating and sold an overriding interest? Or, did he only ever have the interest? What part was the Sched C operation?

He is no longer operating. He owned a 1/3 of a single lease and sold his part for 6000.00.