topic Partial in-plan 401k to Roth 401k conversion in Retirement tax questions

Partial in-plan 401k to Roth 401k conversion

TGT66 — Tue, 10 Feb 2026 10:21:28 GMT

I made a partial in-plan in Dec 2023. I understand the conversion amount will be taxable and I need to pay Federal and NJ estimated taxes by Jan 15 2024 to avoid underpayment penalty. I have not yet received the 1099-R form. Please advise how to pay Federal and NJ Estimated taxes. And how should I later enter them in TurboTax?

Re: Partial in-plan 401k to Roth 401k conversion

Bsch4477 — Tue, 02 Jan 2024 04:20:27 GMT

https://www.nj.gov/treasury/taxation/pdf/current/1040es.pdf

https://www.irs.gov/pub/irs-prior/f1040es--2023.pdf

Re: Partial in-plan 401k to Roth 401k conversion

TGT66 — Tue, 02 Jan 2024 15:42:40 GMT

I am planning to pay my Federal Estimated taxes online at irs.gov, by signing in to my individual account.

I am planning pay NJ estimated taxes online at https://www1.state.nj.us/TYTR_RevTaxPortal/jsp/IndTaxLoginJsp.jsp

Please let me know if you see anything wrong with the above two statements.

Also later when I file my taxes using TurboTax Deluxe, please let me know where can I specify that I made these two estimated tax payments (federal and state).

Thank you

Re: Partial in-plan 401k to Roth 401k conversion

DoninGA — Tue, 02 Jan 2024 15:53:14 GMT

@TGT66 There is not a problem with paying estimated taxes for tax year 2023 online using the IRS website for federal and the NJ website for state. Fourth quarter 2023 estimated taxes have to be paid on or before January 16, 2024.

To enter, edit or delete estimated taxes paid (Federal, State, Local) -

Click on Federal Taxes (Personal using Home and Business)
Click on Deductions and Credits
Click on I'll choose what I work on (if shown)
Scroll down to Estimates and Other Taxes Paid
On Estimates, click on the start or update button

Re: Partial in-plan 401k to Roth 401k conversion

TGT66 — Tue, 02 Jan 2024 16:22:44 GMT

@DoninGA Thank you very much for the prompt responses. My question has been answered.

Happy New Year and Thanks Again