Hi, April. Let's sort this out to address the issue of missing miles.
To start, check the CSV file from MileIQ to ensure accurate Date format, empty the NOTES column, and remove special symbols. If you're uploading a large file, consider splitting it into smaller ones.
Additionally, add at least one vehicle before importing. The system will only import Business Trips, excluding duplicates. Trips with no specified vehicle will be associated with the most recently updated one in QuickBooks.