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@IRonMaN wrote:

I guess my vision must be failing me today.  Where was a 1040NR mentioned in the original post?

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Your statement:

You can't create a correct amended return if your starting point isn't the same as what the latest filed return shows. 

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isn't a generic statement? If not, at what conditions the statement applies?

I am making a general statement that you do not need to re-create the wrong return in order to amend it, and it is guaranteed to be able to re-create it. I use an example to support my statement.