As long as you have it, I would enter it in the Sch C. I won't hurt (won't really help either, but then you can keep track of it in case you need it).
But you would file the Sch C with your 1040 and use SSN for 1040 filing. But there is a box at the top of the Sch C for EIN...so, I would fill it in.
The EIN would be needed if you ever have to file payroll or F1099 for payments he makes....
**Disclaimer: Effort has been made to offer correct information; but due to the discussion forum limitations, the poster disclaims any legal responsibility for the accuracy of the poster's response**
