Undefined control sequence \tbl

Question

I am writing a table in Latex. A reproducible example is as follows:

\begin{table}
\tbl{RE}
{\begin{tabular}{cc} \toprule
\textbf{Step 1:} & estimate p \\
\addlinespace[1cm]
\textbf{Step 2:} & sample a \\ 
\hline
\end{tabular}}
\tabnote{\textsuperscript{a} $p$=a parameter}
\label{sample-table}
\end{table}

But I got the following error:

"Undefined control sequence: \tbl"

. What is the solution?