Welcome and thank you for joining the thread, @Snderitu.
Allow me to share some information about importing bank feeds transactions in QuickBooks Desktop (QBDT).
Instead of starting from scratch, QBDT allows us to import/export data. You can transfer information to and from QuickBooks in case you need to convert, upgrade or create a new company file. Before importing, make sure to identify the transaction type and file format to ensure that QuickBooks will be able to handle them. QuickBooks allows us to import/export list to and from MS Excel.
Importing of bank feeds transaction in QBDT uses the web connect (.QBO) files and not .IIF, you can only import transactions like invoices, bills, checks, and others using the .IIF files. Web connect (.QBO) files are online banking transactions from your bank's website, this can be downloaded and saved on your computer. Afterwards, you can import the transactions so they become available in your bank feeds. The multi-currency feature should be turned on in QBDT so you can import foreign currency bank transactions. I recommend backing up your company file before proceeding with the steps below.
To turn on Multi-currency:
To import web connect (.qbo) files:
You can check these articles for additional reference:
That would allow you to import bank feeds transactions. Please feel free to add a comment below if you have additional questions about importing transactions. Have a wonderful day!