Hi Sotiris,
Of course you can do this! Please read carefully the Callbook Database Support chapter in the Swislsog help or click here:
https://www.swisslogforwindows.com/engli...upport.htm
You need to be QRZ subscriber to retrieve all fields such as QTH Locator, US State, US County, IOTA, QSL Manager (Swisslog retrieves automatically the first callsign found in the QSL INFO field), etc. If you have a free QRZ account you will only be able to retrieve automatically the Name, QTH and US State only.
It's very important to read the Swisslog help! you will find how powerful is Swisslog and how many interesting function it provides.
Best 73