\documentclass[english]{article}

\usepackage{simpleinvoice}

\begin{document}

\setinvoicetitle{My Invoice}
\setinvoicenumber{42}

\setreceivername{Person McNameface}
\setreceiveraddress{Roadname 35C \\ 52353 Cityville}

\setname{My Name}
\setaddress{Streetname 4644C \\ 0000 City}{Streetname 4644C / 0000 City}
\setphonenumber{123 45 678}
\setemail{mail@domain.com}

\setyourref{Person McNameface}
\setourref{My Name}

\setinvoicedate{April 1, 2017}
\setdeadline{21}     % extends deadline to April 22, 2017

\additem{4 chairs}{100 USD}{0}{400 USD}
\additem{1 table}{250 USD}{0}{250 USD}

\setsubtotal{650 USD}
\setvat{0 USD}
\settotal{650 USD}
\setaccountnumber{1234 56 78910}
\makeinvoice

\end{document}