  The theoretical predictions in the MSSM for Higgs-boson production at a
future e^+e^- Linear Collider and Higgs-boson decay processes are discussed
focusing in particular on recent diagrammatic two-loop results in the MSSM
Higgs sector. The present status of the theoretical predictions is briefly
summarized, and it is emphasized that considerable improvements will be
necessary in order to match the high experimental accuracy achievable at a
future Linear Collider.
