\documentclass{scrartcl}
\usepackage[latin1]{inputenc}
\usepackage{tabularx}
\usepackage[letterpaper,top=2cm,bottom=1.5cm,left=1.1cm,right=1.5cm]{geometry}
\usepackage{graphicx}
\setlength{\parindent}{0pt}

\begin{document}

\pagestyle{myheadings}
\thispagestyle{empty}

\fontfamily{cmss}\fontsize{10pt}{12pt}\selectfont

<?lsmb include letterhead.tex ?>

\centerline{\textbf{A R} \hspace{0.3cm} \textbf{T R A N S A C T I O N}}

\vspace*{0.5cm}

\parbox[t]{.5\textwidth}{
<?lsmb name ?>

<?lsmb address1 ?>

<?lsmb address2 ?>

<?lsmb city ?>
<?lsmb if state ?>
\hspace{-0.1cm}, <?lsmb state ?>
<?lsmb end state ?>
<?lsmb zipcode ?>

<?lsmb country ?>

\vspace{0.3cm}

<?lsmb if contact ?>
<?lsmb contact ?>
\vspace{0.2cm}
<?lsmb end contact ?>

<?lsmb if customerphone ?>
Tel: <?lsmb customerphone ?>
<?lsmb end customerphone ?>

<?lsmb if customerfax ?>
Fax: <?lsmb customerfax ?>
<?lsmb end customerfax ?>

<?lsmb email ?>

<?lsmb if customertaxnumber ?>
Tax Number: <?lsmb customertaxnumber ?>
<?lsmb end customertaxnumber ?>
}
\hfill
\begin{tabular}[t]{ll}
  \textbf{Invoice \#} & <?lsmb invnumber ?> \\
  \textbf{Date} & <?lsmb invdate ?> \\
  \textbf{Due} & <?lsmb duedate ?> \\
  <?lsmb if ponumber ?>
    \textbf{PO \#} & <?lsmb ponumber ?> \\
  <?lsmb end ponumber ?>
  <?lsmb if ordnumber ?>
    \textbf{Order \#} & <?lsmb ordnumber ?> \\
  <?lsmb end ordnumber ?>
  \textbf{Employee} & <?lsmb employee ?> \\
\end{tabular}

\vspace{1cm}

\begin{tabularx}{\textwidth}[t]{@{}llrX@{\hspace{1cm}}l@{}}
<?lsmb foreach amount ?>
  <?lsmb accno ?> & <?lsmb account ?> & <?lsmb amount ?> & <?lsmb description ?> & <?lsmb projectnumber ?> \\
<?lsmb end amount ?>

  \multicolumn{2}{r}{\textbf{Subtotal}} & <?lsmb subtotal ?> & \\
<?lsmb foreach tax ?>
  \multicolumn{2}{r}{\textbf{<?lsmb taxdescription ?> @ <?lsmb taxrate ?> \%}} & <?lsmb tax ?> & \\
<?lsmb end tax ?>

  \multicolumn{2}{r}{\textbf{Total}} & <?lsmb invtotal ?> & \\
  
\end{tabularx}

\vspace{0.3cm}

<?lsmb text_amount ?> ***** <?lsmb decimal ?>/100 <?lsmb currency ?>

<?lsmb if notes ?>
\vspace{0.3cm}
<?lsmb notes ?>
<?lsmb end notes ?>

\vspace{0.3cm}

<?lsmb if paid_1 ?>
\begin{tabular}{@{}lllr@{}}
  \multicolumn{5}{c}{\textbf{Payments}} \\
  \hline
  \textbf{Date} & & \textbf{Source} & \textbf{Amount} \\
<?lsmb end paid_1 ?>
<?lsmb foreach payment ?>
  <?lsmb paymentdate ?> & <?lsmb paymentaccount ?> & <?lsmb paymentsource ?> & <?lsmb payment ?> \\
<?lsmb end payment ?>
<?lsmb if paid_1 ?>
\end{tabular}
<?lsmb end paid_1 ?>

\vspace{0.5cm}

<?lsmb foreach tax ?>
\textbf{\scriptsize <?lsmb taxdescription ?> Registration <?lsmb taxnumber ?>} \\
<?lsmb end tax ?>
  
\end{document}