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%.
Once your income reaches a certain threshold, you have to file a federal income-tax return. The income limits depend on your filing status -- single, married, widowed or head of household -- and your age.If youâre 65 or older, the threshold for filing your taxes is higher.f you are married filing separately, you must file a tax return if your income is $3,650 or more, regardless of your age. Dependent children who worked for wages or tips or who collected income from investments in 2009 must file a tax return if: -- their earned income from a job was at least $5,700.