@urlreader wrote:
luckily, I have all records.
on these 2 W2, no code AA, both have code D, one is $17000, one is $7300.
they both have code DD, and 1 W2 also has code C.
and I was 40 years old in 2018.
Ok, the deferral limit in 2018 was $18,500 so you do have an excess of $5800. What should have happened is Turbotax should have popped up a warning saying, "you have excess deferral, since it will be taxed anyway you might want to remove it from the 401k" and the excess should have been added to your taxable wages. I have no idea why turbotax would not put the income on your return.
I can test a copy of TT 2019 at home later to verify what the behavior of the program is supposed to be, but not now.
Now in point of fact, the statute of limitations is 3 years from the April 15 deadline or the date you actually filed, whichever is later. That would have been April 15, 2022. If the IRS didn't catch your mistake, it is too late for them to make you fix it.
If you still want to pay your tax, you would need a copy of Turbotax 2018 installed on your computer, and you need your original 2018 data file, and you prepare an amended return. Here are the general instructions. https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-change-correct-return-a...
Expect the IRS to come back and hit you with interest and a late payment penalty. The penalty is 0.5% per month and the interest is variable, about 4% per year, applied to the entire balance (tax, penalty and prior interest). You can apply for a waiver of the penalty but the interest can't be waived by law. You can also try and file a claim with the Turbotax Accuracy Guarantee. If you accurately entered your W-2s with an excess deferral and Turbotax did not report it, that's a program error. You always owe your own correct tax but Turbotax is supposed to cover penalties and interest for program errors. You can't apply for the guarantee until you actually get the bill for penalties and interest.
