SQL Server用于大量文本的列类型

I'm working on a project which replaces a piece of paper, and on that piece of paper, there are essentially two kinds of text fields. One is 10-40 characters and works well with varchar, but the other is a big box with "attach additional sheets as necessary" at the bottom of the box. So, we're talking a lot of text. I'm working on a project which replaces a piece