The IRS provides more information about this in IRS Publication 542, Corporations. Self Employment Tax. Self-employment tax is social security and Medicare tax for people who are self-employed. This tax applies to those who are sole proprietors with a net profit of $400 or more during the year.
The Mekong River originates at the Lasagongma Spring. The spring is located in the high plateaus of Tibet. It is estimated to be 4,350 kilometers long. 1 person found this useful.
At the border between China and Myanmar (formerly Burma), the Lancang is called the Mekong River, which then flows through Laos, Thailand, Cambodia and Vietnam. It flows into the South China Sea near Ho Chi Min City (Saigon), about 4500 km from its source.