401k provider made a mistake and did not cut two separate checks from retired client’s 401k. Supposed to directly rollover pre-tax and issue separate check for after-tax contributions to be used by client.

Before we call the provider and have them re-issue, I was wondering if the new guidance/rules allow client to do a split deposit and just deposit the pre-tax portion into the IRA and the after-tax portiojn into their taxable account?

I suspect not, but thought I’d ask.

Thanks!