FlyerTalk Evangelist
Join Date: Nov 2018
Location: Istanbul, Turkey
Programs: TK Elite Plus,BAEC GGL,ITA Executive, AFKL Gold,QR Gold,HH Diamond,Bonvoy Gold,ALL Gold
Posts: 14,186
You could fill your passport details on the same page as visa details.
If you need a transit visa to travel from Germany, you could only enter the details for that visa during OLCI.