David,
First I want to say although I am an accountant this is NOT an advertisement, simply a word of advice. When you are starting a business you will want to speak with an accountant who will assist you in filing the various items with NY and the IRS. A good accountant will also assist you in deciding what type of entity you wish to be, which will decide what exactly you will need to file. A good accountant will be available to you when you call, or if he (or she) is tied up will return your phone call in a reasonable amount of time. A lawyer can also assist you with the filings, and the type of entity you should consider. However, the lawyer may not understand the accounting aspect, such as the entries you need to make when you start the business, and on a day to day (or month to month) basis, what type of software you should use, or what the final impact will be on April 15th. One last bit of advice is that you will want to work with your accountant throughout the year. Too many people wait until the end of the year to see their accountant, and by then it is too late to try to save them money on their taxes. By talking to your accountant throughout the year, the work the accountant performs at the end of the year will be substantially less (meaning less expensive) and the accountant will be able to help you plan for future events.
I know that was not the type of response you were looking for, but I hope it will assist you when you do decide to start your business.
Tim