Thankyou so much. Now, my question is that does submitting anything through the online web form after getting AOR may trigger anything on my application? Or it will stay as routine processing? The only reason i missed saying this was that it wasnt even mentioned anywhere in the reasons that i should mention( getting married) as the purpose of my trip. Since, it was all family matters so i wrote visit to family. Now i am gettimg confused that if cic brings that up the reason of my visit. So in short, updating them with the reason of visit will trigger anything or not or they would just update that line on my file and everything goes smoothly?
Look at my other response to your query.
Isolated details like this do not ordinarily have any impact . . . unless (and this should be obvious, this should go without saying) the details are inconsistent or otherwise raise questions relative to the rest of the applicant's situation.
An isolated update using the web form should not trigger non-routine processing. But of course if the information in the update itself raises a question, then it could.
A lot of this is common sense. There is a tendency in the forum, especially lately, to overthink particular details. What makes sense in context and in relation to other details is far more important . . . recognizing, of course, that being truthful is of prime importance.
I could go into an in-depth explanation about how there is very little difference between "to visit family" versus "to attend to family matters," among many other ways to generally refer to a broad, broad range of activities related to family.
But as I tried to explain in my observations in the other response, in the other thread, there is very little if any attention given to the reasons or purpose information given in the presence calculation. Only if what is stated there stands out as indicating something wrong is that a problem, and it is not likely to be a problem in itself but is only a problem in the sense that could lead the processing agent to look at a lot of things a lot more closely. And even that is not a problem if, in looking at things a lot more closely, that does not reveal a reason to be suspicious.
The other thing IRCC sometimes looks at, in the reasons/purposes box of information in the presence calculation, is reference to other countries visited during the trip. This is mostly, probably, about comparing passport stamps and verifying the applicant has disclosed the trip evidenced by a passport stamp.
Again, unless it was a particularly long absence, significantly longer than typical "to visit family," there is no reason to even think about updating your information to add an additional purpose for a particular trip. And, frankly, even if it was a very long absence in that sense, even then it probably is not worth tinkering with. You gave a broad reason for the trip. That has no impact on your qualifications for citizenship. You should be OK.