Where do I enter earned income? I don't have a form but earned $6,000 from a loan contract.

It depends.

The way you report the other income will depend upon whether you earned the income as part of a business or not.  

If you are reporting this income as self-employment income (meaning you are running a business with the intent to make a profit), you will do the following in the Federal interview section: 

1. Select Income & Expenses 
2. Select Self-employment income and expenses 
3. Proceed through the screens to enter your information 
4. When you see the following for income, make sure to select"Other self-employed income.Includes 1099-K, cash, and checks." 

If it is not from self-employment, you would enter the information as follows: 

1. Select Income & Expenses 
2. Go to the  All Income section and select "Less Common Income" 
3. Select "Miscellaneous Income" 

You will then select "Other reportable income" to enter your income.