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An update - the 1099 INT has the last four digits of the Estate's EIN - so it appears I need to file a 1041.

It's very simple as there is only this 1099 INT and the cost of the probate attorney and a few "qualified" deductions that I've identified.  As I have TT home and business and would need to update to TT business for an Estate filing I'm wondering if I should simply mail in the 1041 form or is there an advantage to upgrade.  I bought the Desktop version at Sam's Club, so if needed how can I upgrade?