At your online hearing make your Statutory Declaration and when the two offences are put to you, make your offer.
If it is declined your case will be put over for trial where you will have to attend in person. Then you can see the prosecutor and make your offer.
In the online form I selected 'no' to the did I commit the offence (the fail to give information)…
The problem is you did commit the offence as you failed to respond to the request. You have a statutory defence to the charge provided by RTA s172(7)(b) in that it was not reasonably practical for you to respond (because you didn’t received it).The police have only to satisfy the court that the request was posted to your last known address and it is assumed served unless you can convince the court that it was not. The only evidence you have to support that is your own testimony.
Hopefully your offer will be accepted, and it won’t come to that.