The probably incorrect, long answer: You write the $1000 into the "income" column of your accounts receivables, and the $150 into the "expenses" column of your accounts payable. Deposit the funds in your company bank account. Then, at the end of they year you subtract one from the other, ending up with $750 profit, on which taxes are due if there are no other factors effecting that profit (such as equipment depreciation, travel expenses, insurance premiums, etc., etc., etc.). Next, you calculate your taxes, and exactly how you do that will differ a lot depending upon how your business is structured (sole proprietorship, LLC, S corporation, partnership, etc.), and upon how you have elected to do your accounting, and with some business structures the method of income reporting you have chose, as well as how you and/or your employees are paid by said business. Now, you will probably actually have to calculate these things and make estimated tax payments on a quarterly basis, still filing a return annually and either paying additional or getting a refund depending upon how accurate your quarterly estimates were throughout the year.
Simple and far more correct answer: Hire that local accountant now!