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%.
Income Factors. The Internal Revenue Service has different minimum income levels based on your marital status, age, eyesight and type of income. For example, if you're married, under age 65 and not blind, you have to file a federal income tax return even if you only had unearned income of at least $950.If you filed separate returns and your spouse itemized his deductions, you would have to file a tax return if you earned $5 or more.or example, if you're married, under age 65 and not blind, you have to file a federal income tax return even if you only had unearned income of at least $950.