I've not seen this one yet, but I've seen similar cases where a family member(s)'s profile is missing from the PA's portal. Another common thing I've seen often is that the wrong CoPR is attached to the portal (for the wrong person) or COPR is just missing for some family members even though everyone else in the family's got the CoPR.
What I would do if I were you:
1. Submit the declaration, photo, and address for you, your husband, and your eldest daughter.
2. Send a short e-mail to
IRCC.ClientPortal-PortailClient.IRCC@cic.gc.ca (if the first e-mail came from this e-mail; if it came directly from a VO, e-mail them at that address) right away with a clear subject line regarding the situation and a clear and concise explanation.
3. Submit a webform right away (do it, now!).
4. call IRCC first thing Tuesday morning (Monday is a national holiday). Try again and again until you get through to speak to a real life agent. The agent will be able to add a note to your file.
5. Wait until the day-7 mark, and if you have not heard back from IRCC by then, submit the declaration, photo and address anyway for your youngest daughter.
My take is that:
it wouldn't matter in the grand scheme of things for you to submit the declaration, photo, and address for all family members. The officer reviewing your case will realise they've made a simple mistake and correct it when your COPRs are issued. At the end of the day, visa officers are human too, and they understand humans make mistakes; they can distinguish between actual right and wrong and I don't think they would ever consider something like this to be a
misrepresentation if you're worrying that submitting the declaration for your daughter in your husband's name would be construed as that.
Another option would be:
1. Submit the declaration, photo, and address for everyone in your family except for your youngest daughter.
2. Wait to hear back from IRCC regarding this from their webform and proceed as they instruct you to (past the day-7 point).
This will likely cause a delay in your daughter's COPR issuance, but it just seems to me to be the most "proper" way to go about this (that doesn't mean it's the right way).
Note I'm not a lawyer, so this is my opinion and you should do your own research. I'm interested to see what
@legalfalcon has to say about this.