What was the main purpose of the 3/5 compromise

The three-fifths compromise was an agreement that allowed Southern states to count a portion of its enslaved population for purposes of taxation and representation. The compromise gave the South more power than it would have had if enslaved people had not been counted.

Explanation:

the 22nd united states congress

the answer is: must pay taxes on profits

since it is considered as a part of your income, profits from investments is eligible for tax payment.

the tax from your investment could be influenced by how long you decided to sell it. united states promotes keeping your investment for long term period. so, the tax rate for investments that you sell in less than one year is typically higher compared to investments that you sell in more than one year period.