\documentclass{article}
\usepackage{physics}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{gensymb}
\usepackage{fullpage}
\usepackage{graphicx}
\usepackage{verbatim}
\usepackage{tabulary}
\usepackage{hyperref}
\usepackage{geometry}
\geometry{top=2.0cm, left=2.0cm, right=2.0cm, }

\begin{document}
\title{\Large{TITLE: CS420-01 hw0\\
        NAME OF FILE: startAny420Doc.pdf}}
\author{AUTHOR: Enter tag and your name} 
\date{DATE WHEN PHOTOGRAPHED: Enter tag, day of week and date}
\maketitle


\noindent


\vspace{.5cm}
\noindent
The purpose of the document is to show how to use latex to prepare homework for cs420.

\noindent
Be sure to leave space at the right for your handwritten proof justifications!

\begin{center}
\textbf{Name: Enter tag and Last Name, First Initial(s) (Handwritten):} 
\end{center}

\vspace{.5cm}
\section{} A problem to answer... 

\begin{enumerate}
\item 

\noindent This is first item.       

\begin{center} 
\textbf{Justification: Enter tag and justification for line above (Handwritten):} 
\end{center}

\item This is the second item in the first enumerate.  

\begin{center} 
\textbf{Justification: Enter tag and justification for line above (Handwritten):} 
\end{center}
 
\end{enumerate}

\section{} Again, a problem to answer...
\begin{enumerate}
\item 
\end{enumerate}


\vspace{.5cm}

\end{document}