\tabto to tab again in new line

Question

I'm looking for a method to modify my tabto-command so if the text is to long to fit in one line, the text will be tabbed again in the new line.

\documentclass[a4paper, 12pt, twosides, openany, liststotoc]{scrbook}

\usepackage{tabto}
\usepackage{lipsum}

\newcommand*{\mytab}{\tabto{4.5cm}}

\begin{document}

    \begin{itemize}
        \item One \mytab{\lipsum[4]}
        \item Two \mytab{\lipsum[4]}
    \end{itemize}

\end{document}

Thankful greetings `

Answer 1

Rather than try to do this exclusively with tabto, one could bring in a \parbox. Then you just need to know the widths involved to define the width of the \parbox.

However, this tabto method will not break items across page boundaries.

It would be preferable to dispense with the tabto and use enumitem to achieve the same thing, because it will break across page boundaries.

In the MWE below, I use the tabto method on item "One" and the enumitem method on item "Two".

\documentclass[a4paper, 12pt, twosides, openany, liststotoc]{scrbook}

\usepackage{tabto,enumitem}
\usepackage{lipsum}

\newcommand*{\mytab}[1]{\tabto{4.5cm}\parbox[t]{%
  \dimexpr\textwidth-4.5cm-\labelwidth-\labelsep}{#1}}
\begin{document}

    \begin{itemize}
        \item One \mytab{The \texttt{tabto} way  that will not
              break across page boundaries. \lipsum[4]}
        \item Two 
          \vspace{\dimexpr-\baselineskip-\parskip}
          \begin{itemize}[label=,leftmargin=4.5cm,topsep=0pt]
          \item The \texttt{enumitem} way that will break across
                page boundaries. \lipsum[4-7]
          \end{itemize}
    \end{itemize}

\lipsum[3]

\end{document}