For a sole proprietor you don't file a separate tax return, federal or state.u00a0 You report the income and expenses on Schedule C with your personal 1040 return.u00a0 All of your net profit is subject to self employment tax.A PLLC is just an LLC for professionals and as such you can elect how you want the PLLC to be taxed.u00a0 You can be a sole proprietor and report taxes the same way as discussed above, you can also be an S-Corp which files its own tax return, but the net profits flow through to the owner through a K1 and are taxed on the owner's 1040 return.u00a0 There is some additional overhead to an S-Corp and I suggest you consult with a tax professional before going that route to be sure you understand the requirement to pay yourself a reasonable salary from the business and the application process as for NY you have to make the S election separately with the IRS and with the State.u00a0 The LLC can also be a corporation for federal purposes, which most closely held business don't choose due to the risk of double taxation on dividends paid out of the business.u00a0 No matter what federal choice you make, the PLLC will need to file and pay NY franchise tax.A PC is a corporation and as such only has two choices for federal taxation C-corporation or S-Corporation.u00a0 You will also need to file a franchise tax return and corporate tax return with NY.