I'm filing paperwork to set up a c-corp in Delaware and am now in the
process of filling
out the EIN form on-line. Section 8a asks for "Type of Enity" with one
of options "Corporation" If a corporation, it says "Enter form number
to be filed."

I searched online and found an explanation to enter the income tax
form number to be filed by the entity in the space provided.

How do I know my income tax form number?

Hi formadinocce,

Question:

How do I know my income tax form number?

Answer:

Line 8a?Type of entity.  
Corporation.    
"This box is for any corporation other than a personal service
corporation. If you check this box, enter the income tax form number
to be filed by the entity in the space provided."
http://www.irs.gov/instructions/iss4/ch02.html

C-Corporations file Form 1120 (or Form 1120-A, see Form 1120
Instructions, "Who May File Form 1120-A").

C Corporation Taxes
"A regular corporation (also known as a C corporation) is taxed as a
separate entity under the tax laws. Income earned by a corporation is
normally taxed at the corporate level... and the corporation must file
a Form 1120 each year to report this income."
http://taxguide.completetax.com/text/Q10_2026.asp

FORM 1120 U.S. Corporation Income Tax Return
http://www.irs.gov/pub/irs-pdf/f1120.pdf

FORM 1120 INSTRUCTIONS
http://www.irs.gov/pub/irs-pdf/i1120_a.pdf

Online EIN: Form SS-4 Instructions
http://www.irs.gov/businesses/small/article/0,,id=102765,00.html

I hope I've been able to help you to move on to Line 9!. If you have
any questions, please post a clarification request *before*
closing/rating my answer and I'll be happy to reply.

Thank you,
hummer

Google Search Terms Used: 

form 1120 irs c corporation