How can i turn my quickbook in to dark mood in my setting the is no accounting lab

It's nice to see you here in the Community space, dilanstation.

Currently, there's no option to have dark mode in QuickBooks Online. We used to have the option to switch the QBO to Dark Mode, but this beta feature is what we have for QuickBooks Labs that we've removed already, and this includes the Dark Mode and QuickBooks Themes.

As a workaround, you may consider checking your browser's settings on how to set it up to Dark Mode.

Here's more information on how you can get started and adjust settings after you sign up for QuickBooks Online. It'll guide you in knowing your dashboard and the different views in QBO. 

If you have additional concerns regarding the dark mode in QuickBooks Online, please don't hesitate to post them here in the Community space. I'm always here to answer them for you. Stay safe!