Online Taxman | 950 followers on LinkedIn. US Expat Taxes Made Easy: We believe that filing your US tax return should be easy and painless, no matter where you are | We believe that filing your US tax return should be easy and painless, no matter where you are in the world. Online Taxman is a boutique CPA firm specializing in tax preparation for US expats, entrepreneurs, and other individuals with US tax exposure. Our expertise in international business structuring, financial advising, pension classification and more makes us a leading choice for expats.