The IRS has created a page on their web site that has they say is “a one-stop resource for information” for Small Business and Self-Employed.
You can find forms, find out how to apply for an Employer ID number (EIN), and learn about many topics that are relevant to starting and running a small business as a Sole Proprietor.
Hopefully they will keep it current and up to date.
Give us a call if you have any questions about what you read.