The product key I received with my download does not work. I get either error 607 or 603 when trying to activate my download.

[DJS]

Contact TurboTax support for this error.

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[mlm007]

I am trying to amend my 2019 return and my activation key that I used last year to activate turbo tax is not working. this is my 2019 key that I used last year. , now not working to open program.

mark 

[phone number removed].

[MichelleLO]

@mlm007 Please see the TurboTax FAQ My code doesn't work for information and assistance.