Interesting hearing about the many glitches and non fixes. I'm trialing quickbooks and had some issues. I'm also experiencing above issue trying to add in mileage from July 1st 2020. It adds the info no problem, but it saves under the year 2019.

Using the mobile app, info saves finee and when I check on my desktop it saves under the year 2020! If I do any edit it will then save back under 2019.

I've had other issues where my invoices didn't show the invoice #  in the subject line when sent by email. It show the sample that you see in the email setup section. Very unprofessional for a client to see this. Haven't got any proper help with this either. Was told I'd have a response within 1 day. Still waiting!