Hello Rischhaus-gmail-, 

Welcome to the Community page, 

If you have a look at this link here it will show you how to manually import your bank transactions. Also if you have a look at this link also it will show you what the layout needs to be before you an import it into Quickbooks. 

@rischhaus-gmail- 

Ask your bank which file format they may provide. You will need a 3rd party converter for some file type (e.g PDF)