1. Create tex file
2. latex test.tex
3. To view, run xdvi test.dvi

To create a tex file, hopefully whomever is requiring it has provided you with a template. Then you just need to fill in your information. If not, get yourself a book on tex and start writing. Here is a sample to play with:

\documentclass{article}

\begin{document}

This is a test \LaTeX\ document.
\end{document}