Basic questions about marriage visa type

Q1: I am thinking about bring my fiance(e) into U.S., which kind of VISA should I apply?
Q2: Who can apply for K1 VISA?
Q3: How much does is cost for apply K1 VISA?
Q4: Which service center do I belong to? Where should I file in my application?
Q5: What are the documents do I need? Is there a checklist for all the forms?
Q6: When do I need my birth certificate and is copy good enough?
Q10: How many years of tax return do I need to file in? 1 year or 3 years?
Q13: There is a big age different between me and my finace(e), is that going to be a problem for our approval?
Q26: which will be the fastest way for me to get my SO into US?
Q27: Is there a difference between I-129 and I-130?
Q32: Anything need to be notarized before I file my I-129F?

Other immigration question sections:

• I am clueless, I need some help!
• I know who kind of visa I need to apply but I need to know more about how to apply
• I sent my visa application already and I have questions about what to do next
• We just got our K visa, now what?
• I have more general questions which related to immigration visa

 

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