\documentclass[14pt,a4paper]{extarticle}

\usepackage{xcolor}
\usepackage{multicol}
\pdfminorversion=6
\usepackage{hyperref}
\usepackage{graphicx}
\usepackage[left=15mm,right=15mm,top=8mm,bottom=10mm]{geometry}
\usepackage{float}

\usepackage{multirow}
\usepackage{tabularx}
\newcolumntype{L}[1]{>{\raggedright\arraybackslash}p{#1}}
\newcolumntype{C}[1]{>{\centering\arraybackslash}p{#1}}
\newcolumntype{R}[1]{>{\raggedleft\arraybackslash}p{#1}}

\renewcommand\LayoutTextField[2]{%
	#1 \raisebox{-3.0pt}{#2}%
}
\newlength\templength
\newcommand{\DefaultTextField}[2][]{%
	\settowidth\templength{#2 }%
	\mbox{\TextField[align=1,bordercolor=0.78 0.78 0.75,backgroundcolor={},#1,height=4ex,width=\dimexpr\linewidth-\templength]{#2}}%
}
\newlength\templengthtwo
\newcommand{\DefaultTextFieldMultiline}[2][]{%
	\settowidth\templengthtwo{#2 }%
	\mbox{\TextField[align=1,bordercolor=0.78 0.78 0.75,backgroundcolor={},#1,width=\dimexpr\linewidth-\templengthtwo]{#2}}%
}
\renewcommand\LayoutCheckField[2]{%
	\raisebox{-1.0pt}{#2}\hspace*{2mm}#1%
}
\newcommand{\DefaultCheckBox}[2][]{%
	\mbox{\CheckBox[bordercolor=0 0 0,backgroundcolor={},borderwidth=0.4mm,height=5mm,width=5mm,#1]{#2}}%
}

\newenvironment{changemargin}[2]{%
	\begin{list}{}{%
			\setlength{\topsep}{0pt}%
			\setlength{\leftmargin}{#1}%
			\setlength{\rightmargin}{#2}%
			\setlength{\listparindent}{\parindent}%
			\setlength{\itemindent}{\parindent}%
			\setlength{\parsep}{\parskip}%
		}%
		\item[]}{\end{list}}


\begin{document}
	
	%\def\DefaultHeightofText[12pt]
	\def\DefaultHeightofText{14pt}%
	
	\begin{Form}		
		\begin{center}
			\vspace{-2.5ex}
			\underline{\large\textbf{Customer Receipt}}
		\end{center}
		
		\begin{center}
			\vspace{-0.5ex}
			\begin{tabular}{lll}
				\DefaultCheckBox[name=collectCheckBox]{Collection } &
				\DefaultCheckBox[name=dropoffCheckBox]{Dropoff } &
				\DefaultCheckBox[name=returnCheckBox]{Return }
			\end{tabular}
		\end{center}
		
		\begin{flushleft}
			\section{Device Details}
			\vspace{-0.5ex}
			\renewcommand{\arraystretch}{1.5}%
			\noindent
			\begin{tabular}{@{}L{\dimexpr0.5\textwidth-\tabcolsep}L{\dimexpr0.5\textwidth-\tabcolsep}@{}}
				\multicolumn{2}{@{}p{\textwidth}@{}}{\DefaultTextField[name=makeAndModel,width=0.25\textwidth]{Make \& Model }} \vspace{.7ex} \\
				
				\multicolumn{2}{@{}p{\textwidth}@{}}{\DefaultTextField[name=serialNumber,width=0.25\textwidth]{Serial Number }}
			\end{tabular}
			
		\end{flushleft}
		
	\end{Form}
\end{document}