This CRA page has information on who is eligible for a HST rebate:
https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/gst-hst-businesses/gst-hst-re...
If you are an individual, you can file your rebate application online using My Account.
If you are a GST/HST registrant, you can file your GST/HST rebate application online using the “File a rebate” service in My Business Account. You will also need to file a GST/HST return where you can apply for ITCs.
