- That's correct for the return of contribution from the Roth IRA. The 401(k) plan might issue a corrected code G 2021 Form 1099-R with $0 in boxes 1 and 5, but if they don't, you can submit a substitute 2021 Form 1099-R (Form 4852) with your amendment. I think you've indicated that Fidelity is not the trustee of the solo 401(k) plan, so it's not their responsibility.
- Since there was a loss rather than a gain, the only reason to amend is to correct the reporting of the rollover to the Roth IRA indicate that there was no rollover. You would do this by substituting the corrected code G Form 1099-R provided by the plan or by filing a substitute Form 1099-R (Form 4852) in place of the original code G Form 1099-R that originally reported this rollover. There is no need to wait for the code JP 2022 Form 1099-R since that form only confirms that you received a return of contribution. You explanation statement filed with the amendment will indicate There was a failed rollover, the amount returned (equal to the amount of the failed rollover) and the loss-adjusted amount distributed. Also, make sure to indicate "filed pursuant to section 301.9100–2" on the amended return.
- Presumably you've already contacted your plan trustee to obtain the code E Form 1099-R, so I would expect them to also provide a corrected code G Form 1099-R, but if they don't provide that you can do the substitute as I indicated above.
General instructions for amending with TurboTax are here:
https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-change-correct-return-a...
I would expect Column B of the Form 1040-X to have all zeros since there is no change to the $0 taxable amount originally reported for the rollover to the Roth IRA.
