MWE is here:
\documentclass[12pt,letter]{report}
\usepackage[titletoc]{appendix}
\begin{document}
\tableofcontents
\appendix
\chapter{T.F}
some text
\chapter{C.L}
some more text
\end{document}
In this, the ToC shows A. T.F
B. C.L
But I want,
Appendix A. T.F
Appendix B. C.L
I went through some questions similar to this on stackexchange, but I couldn't set it right. Please help me.