Hello XXXXXXXXXXX, When calculating your Self Employment Taxes for Estimated Taxes only use your income. This amount is only applicable to your income from your self employment. After you have all calculated then you can use a good site to calculate what your total tax will be for 2009. Here is a site that is very easy to use http://www.taxbrain.com/taxcalculator/default.asp I sincerely hope this information is helpful and best wishes on your new endeavor,

When calculating for the self employment think only as single. You may find that at tax time when you and your husband file that your income added together puts you in a higher bracket. A good way to calculate what you need to know now is to look at your Gross income from the writing, subtract out any expenses you have incurred, this will be your net income. Conpute the tax on your net and then add your net to what your husband is expected to receive. Subtract your deductions and compute the tax (the taxbrain site I gave you is great for this part.) You will be able to see what your potential refund or balance due will be for 2009. Compute your SE Tax first though, because half of what you pay in SE Tax is used as a deduction on your 1040. Just remember you are the one with self employment so only the amounts that are from SE should be used when you calculate the SE portion then just add the incomes together when you want to calculate the household income. Here is a site that has a spreadsheet to use to calculate self employment tax http://www.smallbusinessbrief.com/articles/taxes/002317.html Let me know if you need more help before you click Accept,