QuickBooks Online uses the first row of your spreadsheet for mapping and doesn't import its content. If you need the information from the first row of your file, add a header row to your spreadsheet, or duplicate the first line before importing the file.
QuickBooks can't import currency details from a contact list.
If your version of QuickBooks supports multi-currency, your home currency is assigned to all customers and vendors by default. If a change in customer or vendor currency is necessary, select the Currency column and choose the currency you want to associate with the contact on the Review screen while importing your list. (Note: To do this, you must turn on multi-currencybefore starting the import process.)