Ciao Carlos and congrats on the anniversary, I am sure your vacation will be super special!
I found this info on the Firenze Card website, in the FAQ section -
https://www.firenzecard.it/en/faq:
Maybe the part you got to requires that you press 3? otherwise wait until you get here and do it in person.
Firenzecard holders
can enter through the priority access door only with a booking for an appointed time (this booking applies to any minors included in the Card too).
For Firenzecard customers, time slots are always guaranteed for priority entry.
The reservation can be made:
- Phoning the Firenze Musei call centre +39 055 294883 (from 8:30am to 6:30 pm from Monday to Friday; from 8:30am to 06:00pm on Saturday; from 09:00 to 06:00pm on Sunday and holidays) by providing name and surname. You will receive a reservation code to be presented at the ticket office of the reserved museum, to be shown together with your Firenzecard. Please note: after choosing the language, wait even if the initial automatic message specifies that visit availability is not available for the desired day; press 3 for bookings with Firenzecard and 1 for consent to the processing of personal data.
- Going in person to one of the following ticket offices:
◦ Orsanmichele ticket office, inside the Church of Orsanmichele, entrance on Via dei Calzaiuoli (from 10:00am to 4:00pm from Monday to Saturday and holidays; closed on Sunday);
◦ My Accademia ticket office, via Ricasoli n.105/red (from Tuesday to Sunday from 8:15am to 5:00pm, closed on Monday);
showing the Firenzecard or its voucher, you can book (in case you have already booked by phone, you provide the reservation code) and collect the booking confirmation to be shown together with the Firenze Card at the priority access door of the museum when you visit it at the appointed time and date.
- Going in person to one of the following ticket offices: Galleria degli Uffizi (door n.2 only), Museo Nazionale del Bargello, Palazzo Pitti, you can purchase Firenzecard and, at the same time, book and collect the booking confirmation to be shown together with the Firenzecard at the priority access door of the museum when you visit it at the appointed time and date.
Attention: The free reservation must also be made for children under 18 of the family unit of the Firenzecard holder.