Hello, I received an mail from TT that said, "Because of an error in a TurboTax calculation, you have overstated your allowed deductions allocable to investment income, leading to an understatement of Net Investment Income. As a result, you have underpaid your federal income tax." I just followed the instructions TT gave me (2018 Form 8960 deductions) exactly - I opened TT 2018, ensured everything (program and forms) got updated, opened my return, went through the steps (it said it was an automatic fix for Federal only), yet TT said "There were no changes to your return are you sure you need to file an amended return?" Is its possible this email did not apply to me? Thank you.
There should be a contact number on the email ... call them for more instructions. It may be that you were not affected OR more likely, you should not have updated the program (which would have corrected the return) before starting the amendment process.
If there wasn't a phone in the email...there are contact instructions and a special phone number at the bottom of this FAQ:
https://ttlc.intuit.com/community/tax-topics/help/2018-form-8960-deductions/01/843674