Can you help me with uploading the file with info from the bank please. I´ve taken account the format and the name of the three columns. Thanks in advance.

Sure! You got me here to help you with uploading your bank transactions in QuickBooks Online, alejandro-consul.

The process is super quick and easy. We'll just have to make sure that our CSV file is correctly formatted to import them successfully in QBO.

You follow these steps in uploading the file:

1. Select Banking from the sidebar menu, then click the Banking tab.
2. Hit the Upload transactions button.
3. Click Browse, then choose the file you downloaded from your bank.
4. Select the account you want to upload the transactions into from the QuickBooks account ▼ drop-down menu, then select Next. 
5. Follow the on-screen instructions, then click Next.
6. When you’re ready, hit Let's go.

Once done, you can go back to the Banking menu to match and categorize your bank transactions. 

If in case you'll encounter errors, you can refer to this article that contains instructions so you can successfully import your file: Common errors for importing bank transactions using CSV

Please keep me posted on how the steps work. I want to make sure this is taken care of.