What do I do? I got an IRS letter: Sec. 2302 of the CARES act- deferred due dates for SS Taxes, now I owe. It says I reported in schedule H, but don't remember doing so.

I don't remember reporting this. Where can I find it in my taxes. What do I do? I don't remember deferring payments for social security! I am self-employed but my wife is employed and we don't remember deferring payments for her. Thank you all for the help!