Hello,
Up to 3 small errors in passenger details are accepted, especially if it is not a mistake in the year of birth that could change the Swiss Travel Pass fare.
If you still want to change your pass, I suggest you buy it again and request a refund through our online form.
If you have any questions or further support, you can call us at +41 51 225 78 56.
I wish you an amazing stay in Switzerland,
Chiara_S