@John ********
if the hotel files a TM30 on you showing that's where you're "registered" as being and your 90 day report comes up you could indeed try to file it online using the new website here;
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BUT I'd sure wait until you get to where ever it is your address in that province will be then go to the immigration office and file a change of address (TM28 if required) and a new TM30 (notification of residence) so that you can do your 90 day reporting at that address and use it for your extensions.