Hi there, khutchison1231-g!
Thank you for utilizing the Banking feature in QuickBooks.
You'll want to find a converter to convert your file to a CSV or XLXS (to be saved as CSV). You'll only need the following columns in order to import your transactions: Date, Description, and Amount. It's even better if you can connect your bank account so you don't have to upload transactions in the future.
Here are some articles for your additional reference:
I'm just a comment away should you need more help with online banking in QBO. Take care and have a good one!