Typical grammar, spelling errors or even small typos present in your cover letter can ruin the employer's impression and expectations regarding your erudition and literacy. (resumewritinglab.com)
Whether you are a bad speller or typist, the consensus among partners is that small typos leave a BIG impression. (canadianlawyermag.com)
Even after you publish the piece, read it again and fix small typos that have invariably sneaked past you. (inc.com)