If all that was done was to change the business from a sole proprietor which only has one owner, to a single member LLC which also has only one owner, you do absolutely nothing on the tax front what-so-ever. When it comes to taxes, the absolute only difference between a sole proprietorship and a single member LLC is the spelling. That's it. Literally! So not one single thing changes on your tax return. But if you want, you can add the letters "LLC" to the end of the current business name.
