Where to enter non-taxable income where I didn't receive a 1099?

Hi there,

 

I receive Long-Term Disability benefits from a plan I paid premiums for with after-tax dollars. I understand it's non-taxable income. However, my insurance company does not send me a form 1099 and said they do not provide one. Are they supposed to? And if they don't, then where, if anywhere, do I enter this income on my tax return? 

 

Thanks so much.