dmertz
Level 15

Get your taxes done using TurboTax

Yes, if you have a 401(k) that will accept such a rollover, you can roll the pre-tax money over to the 401(k).  Only pre-tax money is permitted to be rolled from a traditional IRA to a 401(k), so this would leave the basis in your traditional IRAs.  This won't help with any Roth conversion that you did in 2021 but it will help with conversions going forward.