Discussion board formatting

For one of my courses, we utilize discussion boards, and we are expected to format using APA7 guidelines. I am unable to indent, as when I press tab, it takes me to the next button instead of the usual expected indentation. I am also unable to create the hanging indent that is required in the references section. I have tried to circumvent this inability of the site by writing my work in a Microsoft Word document first, then pasting it into the discussion format, but when I paste it into the discussion board, it removes all previous formatting that I did within the Word document. I am not pressing paste without formatting, and yet it still seems to wipe what I have done.