[Taasdeev91]

So I emailed them about my marriage and they replied back advising me to submit form 1221 along with Marriage Certificate.

Not sure what their words are in the email, but if they advised you so, then do so.

Fill it up and submit it along with the Marriage Certificate.

Form 1221 is "Additional personal particulars information", so I think it is about you and for you.

 

[Taasdeev91]

Okay, then

Please complete the attached form 1221 and upload it to your immi account along with a copy of your marriage certificate

Do as told is usually the best option. Or do you have any concerns?

 

[Taasdeev91]

Okay, I see...in brief "You"

Because it will be uploaded through your immi-account and signed by you.

You are the main character in the matter. It's about you anyway.

You also mentioned

She's not applying for a subsequent student visa though, but she may apply for a student visa after 8 months or so.

So, when she does that in the future, forms will mostly be completed by her and signed by her.

 

[Taasdeev91]

Action -> View attachment -> Attach

Any luck?

 

[Taasdeev91]

Try with your PC? Normally there will be some button under the "Additional Documents"