Install LuaScript plugin via Plugin Manager
Edit startup file with something like this

local decreaseIndentPattern = [[^\s*(elseif|else|end|\})\s*$]]
local increaseIndentPattern = [[^\s*(else|elseif|for|(local\s+)?function|if|repeat|until|while)\b((?!end).)*$|\{\s*$]]

indent_size = 4

function format_code()
    editor:BeginUndoAction()

    current_indent = 0
    next_indent = 0

    for i=0,editor.LineCount do
        current_indent = next_indent
        start_pos = editor:PositionFromLine(i)
        end_pos = editor.LineEndPosition[i]
        if editor:findtext(increaseIndentPattern, SCFIND_REGEXP, start_pos, end_pos) then
            next_indent = next_indent + indent_size
        end
        if editor:findtext(decreaseIndentPattern, SCFIND_REGEXP, start_pos, end_pos) then
            current_indent = current_indent - indent_size
            next_indent = next_indent - indent_size
        end
        print(current_indent)
        editor:InsertText(start_pos, string.rep(" ", current_indent))
    end
    editor:EndUndoAction()
end


npp.AddShortcut("Source Code Formatter", "Ctrl+D", function()
  format_code()
end)

More example are seen here

Cheers
Claudia

It appears you are seeking a “Lua code beautifier”? If so, Notepad++ cannot really help you with that.

• need to so

local t = 0
for i = 1,10 do

____if t == 5 then
________print(t)
____else
_________print(t/t)
____end
____t = t + 1
end

I did not know how to write the code in the message so added underscore

Example:

• it was so

local t = 0
for i = 1,10 do
if t == 5 then
print(t)
else
print(t/t)
end
t = t + 1
end

Example:

• need to so

local t = 0
for i = 1,10 do
if t == 5 then
print(t)
else
print(t/t)
end
t = t + 1
end