Tax advice

Hello,

 

I am a disabled veteran,my only source of income is my VA disability benefits. I have been informed by the VA that it is considered nontaxable income and does not need to be reported. 

 

I do not have a business or recieve income from any other source. That being said,I have not filed taxes sense 2015. Am I at risk of legal action for not doing so? Even though I have nothing to file? and don't owe any back taxes?