A:AnswerYou will need to reach out to Best Buy Support here: https://www.bestbuy.com/site/customer-service/contact/pcmcat1511375025410.c?id=pcmcat1511375025410.
A:AnswerYou choose what Microsoft Account you want to redeem it to during the download and installation process. Just use your Wife's Microsoft account for that and you will be fine.
A:AnswerOur Office 2019 products don't require a subscription however they also don't include the 1TB of OneDrive cloud storage or the ability to install on multiple devices as well as the other perks of Office 365.