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but they give me a check list letter ask me correct this and fill a new one, do I need file a new one follow what they said? or just explain to them? call them or email them to explain?---Thank you, teacher 8!
-Call them and explain it and see what they will say. It seems the IO who handles your case is not experienced. If you use the entire family income in the I-864 as they suggested, your spouse needs to file I-864A with your I-864.
Read this link for some basic idea (note the part: Married Filing Joint Return-Income Separation):
http://www.immihelp.com/affidavit-of-support/federal-income-tax-documents.html