I've read many times on different forums that 3 years tax returns are needed for K-1 affidavit of support, even though the official (governmental sites) requirement is a 125% of poverty line. Does anybody knows where this 3 years tax return info came from. Or, let say, I was unemployed for year or two and than got a good job ($40,000 for example) this year. Is this sufficient for K-1? Please advise anybody.