note that this is a public forum, we can not see your return or notice.
contact TT audit support.
https://support.turbotax.intuit.com/irs-notice/audit-support/
the notice should give details of what wasn't on the filed return. is it correct?
do not delay. it appears that besides the unreported pension, the IRS is claiming another $18,000 or so in unreported income.
