Hello I am using MikTex in TexStudios and I have this document:
\documentclass[paper=letter,fontsize=11pt]{scrartcl} % KOMA-article class
\usepackage[english]{babel}
\usepackage[utf8x]{inputenc}
\usepackage[protrusion=true,expansion=true]{microtype}
\usepackage{amsmath,amsfonts,amsthm} % Math packages
\usepackage{graphicx} % Enable pdflatex
\usepackage[svgnames]{xcolor} % Colors by their 'svgnames'
\usepackage{geometry}
\usepackage[colorlinks=true,linkcolor=blue,urlcolor=blue]{hyperref}
\usepackage{float}
\usepackage{etaremune}
\usepackage{wrapfig}
\frenchspacing % Better looking spacings after periods
\pagestyle{empty} % No pagenumbers/headers/footers
%\addtolength{\voffset}{-40pt}
%\addtolength{\textheight}{20pt}
\setlength\topmargin{0pt}
\addtolength\topmargin{-\headheight}
\addtolength\topmargin{-\headsep}
\setlength\oddsidemargin{0pt}
\setlength\textwidth{\paperwidth}
\addtolength\textwidth{-2in}
\setlength\textheight{\paperheight}
%\addtolength\textheight{-3in}
\addtolength\textheight{-2in}
\usepackage{layout}
\usepackage{multicol}
%%% Custom sectioning}{sectsty package)
%%% ------------------------------------------------------------
\usepackage{sectsty}
\sectionfont{% % Change font of \section command
\usefont{OT1}{phv}{b}{n}% % bch-b-n: CharterBT-Bold font
\sectionrule{0pt}{0pt}{-5pt}{3pt}}
%%% Macros
%%% ------------------------------------------------------------
\newlength{\spacebox}
\settowidth{\spacebox}{8888888888} % Box to align text
\newcommand{\sepspace}{\vspace*{1em}} % Vertical space macro
\newcommand{\NewPart}[2]{\section*{\uppercase{#1} #2}}
%%% Begin Document
%%% ------------------------------------------------------------
\begin{document}
{\Huge\usefont{OT1}{phv}{b}{n}{Bruce Dickinson}}\\
Address
\href{mailto:mymail@somewhere.com}{mymail@somewhere.com}\\
07575349875437
\end{document}
and I don't understand why there is space left before Bruce, does anyone know why this is happening?

\noindent{\Huge\usefont{OT1}{phv}{b}{n}{Bruce Dickinson}}\\. – Jan 16 '19 at 00:41\\does not end a paragraph, and you should not use it this way. From what I see, you are not using the document class that might be optimal for your task. It looks to me that you are writing a letter, and there are several document classes for that, perhaps scrletter may be more appropriate. – Jan 16 '19 at 01:03