Of course you can continue to use QB2013 or 2011 or 2017 or whatever tickles your fancy. Anything prior to QB2019 (and I can't remember the revision that changed this in 2019) won't ask you for a login. It was first rolled out mid-2019.
As for a subscription service and getting money out of me, I've got the company set up on auto pay, so even if I don't upgrade every year, I still pay for the upgrade. I'm not out to screw Intuit, I'll pay them annually, just QUIT forcing me to login to an online site that has nothing to do with our accounting practices.
