Hi maymay!
Welcome to QuickBooks Community. Let me assist you with the exported file.
The data you exported data from QuickBooks Online has defaulted in an Excel file format. You'll want to make sure that there's a Microsoft Excel installed on your desktop. If not, you can open it using other spreadsheet applications such as Google Sheets.
Also, if the file won't open after clicking it at the bottom of the browser, you'll want to open File Explorer instead. From there, search and select the downloaded file to open it.
Aside from the Chart of Accounts, you can export other data, too. Please check this article for more details: Export reports, lists, and other data from QuickBooks Online.
Do you need help in customizing reports? Please check these links on how to pull up the commonly used financial reports and how to personalize them:
Leave a comment below if you need anything else. I'll help you!
