TeresaXi said "The only place I know that will do returns and try on clothes is WINNERS. Giant Tiger, Marks, Ardene, etc will not accept returns or let you try on clothes. Not yet anyways. Call first to confirm "
You are correct in that Marks will not allow you to try on clothes (change rooms closed/locked) however they are accepting returns - I have made several returns of items purchased online and store purchased items that I was not able to try on. As stated above, do call stores first to confirm their current protocols re: fitting rooms, returns, etc.