I-944 instruction 읽어보시면 다 나와있는 부분입니다.
If it is available, you must provide evidence of any degrees or certifications received, such as transcripts, diplomas, degrees, and trade profession certificates or equivalent (if this evidence is unavailable, you should provide an explanation and, if possible, evidence of unavailability such as a letter from the issuing institution). Foreign education should include an evaluation of equivalency to education or degrees acquired at accredited colleges, universities, or educational institutions in the United States. For a list of organizations that provide equivalency evaluation, see the National Association of Credential Evaluation Services (NACES), at http://www.naces.org/members.htm.
그리고 I-20는 485 instruction에 보시면 역시나 나와있는 부분이에요. 물론 family preference category가 아니시니까 제출 안해도 되겠지만 심사관은 언제나 RFE날려서 요구할 수 있으니 시간절약을 위해서 켕기는게 없다면 다 제출하셔야죠.
Anyone applying under the following immigrant categories must submit evidence to show they have continuously
maintained lawful immigration status while in the United States and are therefore not barred from adjustment by INA section 245(c)(2): applicants applying under a family-based preference category or an employment-based preference category; special immigrant religious workers, Afghan or Iraqi nationals, and international broadcasters; and selectees under the Diversity Visa Lottery program.
Acceptable evidence may include, but is not limited to, copies of the following documents:
A. Form I-797 approval notices for all extensions and changes of nonimmigrant status;
B. Form I-94 Arrival-Departure Record, including printouts of paperless I-94 admissions;
C. Form I-20, Certificate of Eligibility for Nonimmigrant (F-1) Student Status – For Academic and Language
Students, or Form I-20, Certificate of Eligibility for Nonimmigrant (M-1) Student Status – For Vocational
Students, including all pages containing notations by authorized school officials;
D. Form DS-2019 (formerly IAP 66), Certificate of Eligibility for Exchange Visitor (J-1) Status, including all pages
containing notations by authorized exchange visitor program officials; or
E. Passport page with an admission or parole stamp (issued by a U.S. immigration officer).
Include evidence for every time you entered the United States and for the time periods spent in the United States. See the Additional Instructions for information on whether your specific immigrant category requires this evidence. If you are applying as an employment-based first preference, second preference, or third preference applicant or as a fourth preference special immigrant religious worker and you believe you are exempted from this bar by INA section 245(k), you should submit evidence to prove you qualify for this exemption. For more information, see http://www.uscis.gov/green-card/green-card-processes-and-procedures/adjustment-status.
이런게 이해가 안되면 변호사 쓰셔야 되는거고요.