You either did not read the docs, or they are still unclear to you. To me even the error message is clear. Text::CSV's print () needs completely different arguments then what you pass.

PLEASE, do us all a favor and read the manuals before you post questions here that appear rather silly.

use warnings;
use diagnostics;

use Spreadsheet::XLSX;
use Text::CSV;

my $excel = Spreadsheet::XLSX->new ("Sample.xlsx");
my $csv   = Text::CSV->new ({ binary => 1, auto_diag => 1, eol => "\n"
+ });

foreach my $sheet (@{$excel->{Worksheet}}) {
    printf ("Sheet: %s\n", $sheet->{Name});

    #my @worksheet = qw(sheet1 sheet2);

    my $Minrow = 1;
    my $maxrow = $sheet->{MaxRow} || $Minrow;
    my @wanted_cols = (8, 9, 10, 20);

    open my $fh, ">", "new.csv" or die "new.csv: $!";

    foreach my $row ($Minrow .. $maxrow) {
        $csv->print ($fh,
            [ map { $sheet->{Cells}[$row][$_]{Val} } @wanted_cols ]};
        }
    close my $fh or die "new.csv: $!";
    }
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