If you look at the advice from the experienced travellers below there is information about how to make reservations. If you have questions about specific reservations you need to make, just ask for help.

Here is some useful information from the experienced travellers in the Community regarding both planning, reservations and activation of pass and travel days. 

Planning

The rail planner is normally not up to date, as it only is updated once a month, so to be sure of the time table you better check the timetable and availability on the websites of the national railways. The bigger national railways, like DB (Germany) SBB (Switzerland) and ÖBB (Austria) cover several countries. 

Reservations 

Where will you be travelling?

Eurail covers 33 countries and through the website you can make reservations for 19 of them, according to Eurails own information. 

Thanks AnnaB - I have been looking at all of these links and trying to figure it out.  I would be more than happy to pay two Euros more to have all our seats reserved on one website rather than have to go to each train companies website.  My issue right now is that Eurail will not even let me add travellers to my trip - have you seen this issue before? any fix?

beyond that, I did go to the Italian OBB site and looked at reserving a ticket from Rome to Venice and it looks like there are NO seats available to reserve on the date I need.  I looked and there are tickets still available to purchase on these trains, just nothing left for Eurail holders I guess!  I scrolled through all the trains for multiple days and all of them say “ticket not available” - does this seem right?  travel is early August so maybe the trains are all full already which is going to cause us some real issues.

 

@Angelo Can you help out with the Italian trains?

@JeffF Can you post screen shots of the error message?

@rvdborgt@seewulf Do you have a solution to the problem? Have you seen it before?

here is a screen shot of the form to add a traveller - we are adding the Last Name and Pass Number exactly how it shows in our itinerary from the travel agent….now, it says “add a traveller with a Mobile Pass” which I believe that we have….but how do I make sure?

 

That can't be true, since domestic trains in Italy don't have pass holder quotas.

Most probably, you used the "Seat only” option, but that doesn't work. Add the "Interrail / Eurail” discount and then look for normal tickets.

I have confirmed that we have a Mobile Pass.  Our itinerary also states that we can book all of our seats via the Eurail Mobile App - all info in this community says that that is not true.  Just want to make sure I am not missing something.  Should we be able to reserve seats directly in the App?

thanks for this - it gives me hope as you are correct i selected Seat Only - I went back to OBB and can’t see where I add the "Interrail / Eurail” discount - appreciate your help

FOUND it - working on it now

thank you so much @rvdborgt and @AnnaB - I was able to book all seat reservations for Italy and Switzerland!! appreciate it - this was incredibly helpful

NOW I am stuck on the SNCF (TGV) booking - I am on their website but see NO place to add Eurail pass (I think they call it Interrail)….any advice?  I am booking from Basel to Paris.

You did not read enough-it is simply NOT at all possible to RES directly online on SNCF.

Have to call them-or use ither ways-and no, there is no sneeky bypass like for ITaly.

Aslo_ for IN Swiss hardly anyone REServes local domestic trains-thats more for groups etc.

Also: Direct from Swiss-also Basel, to P cost an awful lot extra-easily avoidable by using TGV from next stop-Mulhouse-or even Strasbourg=means many more options too. Get there by local train.

You can't book reservations in the app. It just forwards to some of the websites where you can, including the Eurail website.

Online, Basel - Paris can only be booked via Eurail (+2€ booking fee per person and seat).

By phone, you can also book via NS (don't forget the country code +31) or SNCF (Press #85 for English). In both cases no booking fees and reservations are sent via e-mail.

Details entered into the fields to add passes are all case sensitive. Please ensure that you use the same cases that your travel did when purchasing the passes. You can follow the reservation advice from other travelers noted in this thread. You can also find alternative reservation methods that is listed per country over here.