When I try to print the”save as” box comes up instead.

It won’t let me print

You didn’t tell us which version of LO you are using or which operating system you use (there are several). And it would help us a great deal if you told us exactly what you do (key strokes, mouse action, which icon) when you command a print. A little more information will go a long way to answering your question.

Did you figure out what went wrong? Were you trying to use keyboard short-cuts learned from some other program? In LibreOffice Print is Ctrl+P. Using the drop-down menu Print is menu File → Print,