Enter this amount and code 501 on Form IT-201-ATT, line 6, or Form IT-203-ATT, line 7, or include it on Form IT-205, line 10. Submit your forms as follows: 1) Inquries and questions can be sent via email to the Plan.The SOPM is a "living" resource that is updated on an ongoing basis. Please see New and Notable for a summary of the most recent changes. Contracts required that the parts be manufactured in the United States. 501(c)(3) nonprofits apply using Form 1023 or Form 1023-EZ.