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Here it is:
If you are filing Form I-130 with Form I-485, and you live in the United States: USCIS Chicago Lockbox

For U.S. Postal Service:

USCIS
P.O. Box 805887
Chicago, IL 60680-4120

For Express mail and courier deliveries:

USCIS
FBAS
131 South Dearborn-3rd Floor
Chicago, IL 60603-5517