Hi, I downloaded, installed, and activated TurboTax 2019 Premier for Windows, purchased from Amazon, on Sunday 11/17/2019 and got started on my returns.  Everything seemed to be working fine. I was required to activate again when starting TurboTax tonight, 11/18/2019. I'm running Windows 10 Home 1909 version 10.0.18363.476 I don't know how activation works internally, but if it works by system thumbprint where multiple activations of the same thumbprint count as a single activation, I should be fine.  If it's a simple numerical count, I could end up having a problem down the road if this keeps happening. ... View more