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@Tink wrote:

I am also struggling with the NAICS code

the IRS confirmed that the NAICS code for any online sales is  454110.

Proseries refused to e file the return saying it is invalid.  It is a partnership and due but I cannot get help.  The price goes up and the service and quality goes down.  So frustrated.  

Any idea how to Pro Series to Get it fixed?  Or a work around

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In essence, what you need to do is to pick a more general category for tax reporting because the codes used by the IRS just do not get to the level of specificity you see in NAICS.