If my total income adjusted by 50% is lower than $25,000, do I need to do anything further?

[KrisD15]

Do you mean that your adjusted income is lower than your Standard Deduction? 

You still need to enter all your tax forms and file. 

[VolvoGirl]

Are you asking something about Social Security?  You have to enter all your income including Social Security.  Turbo Tax will automatically figure any taxable part of Social Security.

[Mike9241]

please clarify what you're asking about. this could be anything from taxable social security to the passive loss deduction for rental real estate.