Do you have other income besides this?
What gross income do you expect?
Whar are expenses in connection with this business do you expect?
What is your filing status - married/single? any dependents?
Let first estimate your taxes.
Assuming you would have $20,000 expenses and net income $280,000.
Total SE taxes - $19,801.
Adjasted Gross Income $280,000 - ($19,801/2)= $270,100
Assuming you will have standard deduction your taxes will be $72,944
Total tax - $92,745.
You need to pay estimate tax. Form 1040es should be filled - http://www.irs.gov/pub/irs-pdf/f1040es.pdf Be aware that the firt payment is due on April 15, 2006.
California taxes will be ~$23,000 and you need to pay estimate taxes as well. Here ares a form and instructions to be filled:
Because of large state taxes you will probably use itemize deductions and you actual federal taxes will be lower. You may deduct your mortgage interest, real estate and property taxes, charitable contribution etc.
You may consider some kind retiremet plan to reduce tax presure. Also medical insurance cost would be deductible.
Sorry, nail services are not deductible. Lunches might be deductible if the customer is invited and you pay. Travel expenses are deductible if traveling for business. I feel that you need to be familiar with IRS publication 535 to be aware what are deductible expenses - http://www.irs.gov/pub/irs-pdf/p535.pdf