Hey k3nt,
Thank you for being part of Intuit for so long, and welcome to the QuickBooks family! As Mint and QuickBooks Self-Employed are built on completely separate platforms, the easiest way to import all your transactions is with a CSV file. This'll ensure your transactions are added with the correct sales tax, and they'll be represented appropriately on your reports. You should be able to obtain this file from your bank, then it's just a few simple steps to bring into QuickBooks:
- Open QuickBooks Self-Employed in a web browser.
- Select Settings ⚙.
- Select Imports.
- Select the account you want to add the transactions into.
- Select Browse and find the file you downloaded from your bank. It's usually in your Downloads folder.
- Select the file and select Open to start the import.
- Review the column headers and data. Make sure the Date, Description, and Amount columns on the CSV match the columns and order in QuickBooks. The other column headers can be in any order.
- Select Continue to complete the import.
Here's a great article with plenty of useful info: Add older transactions to QuickBooks Self-Employed
Hope this helps! Feel free to reach out if you have any other questions.