"I'm sorry for omitting to say that all contributions were made through payroll deductions."
That complicates things. I suggest telling TurboTax that your employer told you about other contributions and enter $2 as an amount your employer contributed for 2024 but did not include on your W-2.
Note, however, that if you requested a return of $413 and $415 was distributed because there were $2 of investment gains attributable to the $413 being returned, the amount of contribution returned was $413, not $415.
