Here's "What's New:"

https://proconnect.intuit.com/community/proseries-tax-news-updates/discussion/proseries-tax-2021-ins...

Thanks - I have seen that.  However, it doesn't tell you how to make the change.  It is not an option in "Options"

Lisa shows it, here:

https://proconnect.intuit.com/community/proseries-tax-discussions/discussion/proseries-update-for-20...

"It is not an option in "Options""

You started this topic, but seem to have resolved it based on your reply on another topic. Would you please share here what you did, so others will benefit and also, now we will know you resolved your issue? That's why it's called a Peer Community. Thanks.

Once 2021 is installed, 2020 defaults to the new background color, you can turn it off in Tools > Options

Prior to 2020 the only option is to uncheck the "Field color" box in Options which makes it look odd enough for you to think, "why does this look weird?".

You may have to be within a client file for the option to appear in Options.