The Turbotax program 2025 deducted the full amount of our social security benefits stating we owed 0. Why did the program do this? Need a Turbotax rep's explanation?

[AmyC]

 If the first thing you enter is Social Security, the program won't know how much is taxable until you finish entering the rest of your income. Social Security is often taxable. If half your benefits plus your other income surpasses the income limits, it is taxable.

Reference:

IRS reminds taxpayers their Social Security may be taxable

[mesquitebean]

@ wthorpe-bt 

Here's a scenario that could have happened:

Are you still preparing your return, or did you already file and were notified by the IRS in a letter? 

After you entered your Social Security income in the return, there is a screen with a list of several countries, and it asks if you as a US citizen lived in one of those countries (where SS is not taxed by USA).  Some Social Security recipients have not answered that screen correctly.    If you answer incorrectly, it will think you live in one of those countries, then your Social Security is not taxed and Line 6b on your 1040 would show up blank or 0.   If you already filed, the IRS is catching a lot of these Social Security errors, making the changes, and notifying filers.      So that is possibly what could have happened.  This may or may not be your situation.