One of the Forms 1099-R from the employer's plan likely reports a qualified plan loan offset distribution and includes code M in box 7 to indicate that your husband has until the due date of his tax return, including extensions, to come up with the funds to roll this amount over to a qualified retirement account like an IRA.
Another of the Forms 1099-R from the employer's plan would likely be reporting the distribution of the balance that remained in the plan after a portion was used to satisfy the offset distribution.
Why there is a third Form 1099-R is a bit of a mystery unless your husband also had funds in a designated Roth account in the plan which was also distributed or perhaps if your husband left the employer in or after the year he reach age 55 and in 2024 he reached age 59½.
TurboTax is likely correct in the amount of tax liability generated by these distributions.
What are the codes in box 7 of each of the Forms 1099-R?
