Investors & landlords

If the capital gain was more than the $1,050 filing requirement or if the $1,200 was self-employed (not W-2) income over $400, he must file a return.

2016 Filing requirements for dependents.

Federal Dependent filing requirements: (State requirements may be different)
 1) Dependents unearned income was more than $1,050.
 2) Dependents earned income was more than $6,300.
 3) Dependents  gross income was more than the larger of-
       a) $1,050, or
       b) Dependents earned income (up to $5,950) plus $350.
 
Or Dependent had net earnings from self-employment of at least $400. 

However, if any tax was withheld, then Dependent might want to file anyway to get a refund of the tax withheld.

Also, a person that CAN be a dependent cannot claim him/her self and must check the box that says that another taxpayer can claim them (whether or not that taxpayer actually claims him/her).

Note: your state filing requirements might be different than the federal.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**