I have one of my new client outside in US that he is the US Citizen. He has his own business out of USA and he lives there since 7 years. He is married and have one child. I would like to know what form I need to use in Pro series to file his tax return? Also, He never file tax return since 7 years. Please advice

In addition, what document I will ask for someone who work outside of US as his W2 or 1099 to file his tax?

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