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.
The Mekong River (known in Tibet as Dza-chu, China as Lancang Jiang and Thailand as Mae Nam Khong), is a major river in southeastern Asia. It is the longest river in the region.