USCIS has quite a bit of information here: https://travel.state.gov/content/travel/en/us-visas/immigrate/family-immigration/family-based-immigrant-visas.html ht

USCIS has quite a bit of information here: https://travel.state.gov/content/travel/en/us-visas/immigrate/family-immigration/family-based-immigrant-visas.html https://travel.state.gov/content/travel/en/us-visas/immigrat...