Link two domains to the same site

Hey all,

For reference,  my site https://www.myvitaminscore.com/

I live in Canada so when I purchased my domain I purchased .com and .ca

My questions is whether or not I can link my .ca domain so that it automatically goes to my .com website. So no matter if they visit .com or .ca they end up at the same domain?

I'm unsure if this is something I do through squarespace or not. Any help is appreciated. 

Thanks very much for that!