How can i import my mileage data from this app called everlance to QuickBooks?

I'm happy to see you here in the Community, @jmanthealaskan-g.

At this time, the system only allows you to import trips directly if you're using the MileIQ and Google trip applications. Otherwise, you'll need to convert your data to a .CSV file and manually import them. This is the supported file type of all the transactions that can be imported in QuickBooks Self-Employed.

However, I also recommend contacting the Everlance Support Team, to verify if they have other way import your trips in QBSE. 

Once you already have your data in QuickBooks Self-Employed, you can always utilize the Mileage tracking option to help you record your trips automatically. Here's a link that will give you the details on how to manage this feature: How to automatically track mileage in QuickBooks.

Know that our developers are always working and considering new functions to be added in the system to cope with your business needs. 

I'll be around to help if you have any other concerns about this or with QuickBooks. Just leave a reply below, and we'll take it from there. Have a good one!