It really depends on what your business is doing. Selling products or services. Because I have a biz selling products I can only tell you what I went through selling my book in L.A. county.
1. go to IRS.gov, get a FEIN,(Federal emloyment identification number) also called a tax ID #, you really only need it if you have employees, but it's safe to get so you don't have to use your social security # as your tax id# on your documents.
2. get a biz license from your county or city, call around
3. get a sellers permit from your city
4. get biz checking/banking account
5. get quickbooks with the instructional aid to record all your transactions/expenses
6. sell your product and include your city's local tax code
7.make billions
I hope this helps or sparks others to share their knowledge.