Business & farm

Thank you very much for your support.IRS gave us an extension period to file the tax return. Could you please help me to solce the problems given below?

I want to know,

1.Can we submit W-7 as e-file?

2.Can we fill a copy of W-7 by downloading if we decide to mail it?

3.What are the other documents we should attach with w-7?

4.Are the other documents be certified copies or require orginal ones?

5.To where do we mail this file?