If purchased from a third party like Studica or OnTheHub, log in to your account on their website and check the "My Downloads" or "Order History" section. Steps to Activate IBM SPSS 26
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Authorized users can log in to the IBM License Key Center to view, generate, or manage their authorization codes. If purchased from a third party like Studica
Depending on how you obtained the software, you can find your code in several ways: license code ibm spss 26