the plant or animal tissue rich in such molecules, considered as a food source supplying essential amino acids to the body. 3. (formerly) a substance thought to be the essential nitrogenous component of all organic bodies. adjective. 4. Biochemistry. of the nature of or containing protein.
The rate, as well as the amount, you pay changes as the amount of income does. You must file a tax return if you had net earnings from self-employment of $400 or more. This is your total self-employment income less the expenses paid in operating your trade or business, multiplied by 92.35%.
For tax year 2012 filings, you needed to have income of $9,750 if you were single, younger than 65 and had no dependents. The amount was $12,500 if you were a head of household; that is, a single person with dependents. Married couples filing together needed to earn $19,500 before they were required to file.