Hello Altaf,
In Government medical colleges 15% seats are filled through All India Quota and 85% seats are filled through State Quota. All India Quota seats are available for candidates from All over India and for State quota seats the candidates from the particular state in which a college is located can apply. 
Documents which are required for admission to the college after AIQ counselling are-
NEET 2018 Admit Card
NEET 2018 Rank Letter or NEET Result
Class 10 Certificate and Marksheet (for date of birth proof)
Class 12 Certificate and Marksheet
ID Proof (Aadhaar/PAN/Driving License/Passport)
Eight passport size photographs
Provisional allotment letter generated online after allotment.
Community Certificate (if applicable)
For detailed information - https://medicine.careers360.com/articles/neet-counselling

p { margin-bottom: 0.25cm; line-height: 120%; }a:link { }For State quota admissions, every state has its own eligibility criteria.
As per the Eligibility criteria for Maharashtra MBBS admissions-
The candidates must have completed Class 12 from the state and should be a domicile of the state to apply for admission under state quota. And, the following documents are required for admission-
NEET UG 2018 admit card
NEET UG 2018 mark sheet
Nationality certificate (Passport/Class 12 leaving certificate/Certificate from the District Magistrate)
Domicile Certificate issued by the District Magistrate or any competent authority.
Class 10 pass certificate or birth certificate, as a proof of date of birth.
Statement of marks of Class 12 or equivalent examination
Medical fitness certificate
Maharashtra MBBS application form 2018.
Caste Certificate, if applicable
For detailed information- https://medicine.careers360.com/articles/maharashtra-mbbs-admission

To check the detailed eligibility criteria for Uttar Pradesh admissions and the list of documents, kindly go through the link below-
 https://medicine.careers360.com/articles/up-mbbs-admission

Good Luck!

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