For Spouse, She/ he needs following documents: 1. marriage Certificate 2. Sealed medical report for USCIS certified doctors ( needs all immunization records) preety expensive about $400.00 3. Birth certifiactes 4. G325A form with parents information 5. If he/she already in US than copy of visa, I-94 , and passport 6. If worked in any place in US than copy of last 3 years Tax return papers and all W-2 All these will be rquired at I-140 filing phase coz you can file I-140 & I-485 together on EB2 category. If you need any information e-mail me through sajha. Are you already married or, planning to marry soon. I hope this will help - Saan-dai