1099-R Question: Traditional IRA to Roth Conversion Taxes
In 2023, I opened a traditional IRA and funded it with post-tax dollars up to the contribution limit. Did the same thing in 2024. After hitting the limit in 2024, I bought some stocks within the traditional IRA. Later that year, I decided to convert the entire traditional IRA to a Roth IRA. Just got my 1099-R in the mail and it says the "taxable amount is not determined." I'm confused about a couple things now. Do I need to file Form 8606 with my taxes? And does it make sense that I should only have to pay taxes on the investment gains from the stock price increases since I already paid tax on the contributions? The whole "taxable amount not determined" thing is throwing me off.
18 comments


Amara Okafor
You definitely need to file Form 8606. This form is specifically designed to track non-deductible contributions to traditional IRAs and conversions to Roth IRAs, which is exactly your situation. And yes, you only need to pay taxes on the gains. Since you made non-deductible contributions to your traditional IRA (meaning you used already-taxed money), you don't need to pay taxes on those contributions again when converting to a Roth. You'll only owe taxes on any earnings that occurred between when you made the contributions and when you did the conversion. The "taxable amount not determined" box is checked because your financial institution doesn't know your tax basis (how much non-deductible money you put in). That's why Form 8606 is so important - it's how you tell the IRS what portion is taxable and what isn't.
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Giovanni Colombo
•If I already did the conversion last year but didn't file an 8606 for that tax year, can I still file one for this year or am I in trouble? Also, does the 8606 get filed every year I make non-deductible contributions or just when I do a conversion?
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Amara Okafor
•You should file Form 8606 for any tax year when you make non-deductible contributions to a traditional IRA, regardless of whether you do a conversion. This establishes your basis and creates a paper trail. If you missed filing it in previous years, you should file amended returns with Form 8606 included. While there's technically a penalty for not filing it ($50), the IRS often waives this if you can show you didn't owe additional tax. The bigger issue is ensuring you don't get taxed twice on money that should only be taxed once.
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Fatima Al-Qasimi
I've been in a similar situation, and using taxr.ai at https://taxr.ai really saved me when dealing with my IRA conversion and the confusing 1099-R. I was totally puzzled by the "taxable amount not determined" box and wasn't sure how to handle the Form 8606 correctly. Their AI analyzed my 1099-R and walked me through exactly what portions were taxable and which weren't. The tool helped me understand my tax basis calculations and showed me how to properly document my non-deductible contributions.
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StarStrider
•Does it actually work with IRA conversions specifically? I'm doing a backdoor Roth this year and I'm worried about messing up the paperwork. My tax situation is complicated because I also have an old 401k.
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Dylan Campbell
•I've seen so many tax tools that claim to handle special situations but then fall apart with anything slightly complex. Can taxr.ai actually handle the pro-rata rule calculations if you have multiple IRAs with both pre-tax and post-tax contributions?
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Fatima Al-Qasimi
•Yes, it specifically handles IRA conversions and backdoor Roth scenarios. It walked me through all the basis calculations and pro-rata rules when I uploaded my documents. It asked targeted questions about my conversion that my regular tax software didn't. It absolutely handles the pro-rata rule calculations across multiple IRAs. That's actually one of the areas where it excels. I had a mix of deductible and non-deductible contributions across two different IRAs, and it correctly calculated the taxable portion of my conversion while considering my entire IRA balance across all accounts.
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Dylan Campbell
Took a chance on taxr.ai after seeing it mentioned here, and I'm actually impressed. I was about to calculate my backdoor Roth conversion completely wrong. I didn't realize that having an old SEP-IRA would affect my conversion taxes through the pro-rata rule. The analyzer flagged this immediately when I uploaded my 1099-R and asked about my other retirement accounts. Saved me from a potential audit headache and probably a few thousand in unexpected taxes. Really wasn't expecting it to catch something that specific.
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Sofia Torres
After weeks of trying to reach the IRS about my 1099-R and Form 8606 questions (kept getting disconnected or 2+ hour wait times), I finally tried https://claimyr.com and got through to an IRS agent in about 20 minutes. They have this system that holds your place in line and calls you back when an agent is available. Their demo video at https://youtu.be/_kiP6q8DX5c shows exactly how it works. The agent was able to confirm that I needed to file Form 8606 for both years I made non-deductible contributions, even though I only did the Roth conversion in the second year.
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Dmitry Sokolov
•Wait, how does this actually work? Doesn't everyone have to wait on hold with the IRS? I don't get how a third-party service can somehow get you to the front of the line.
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Ava Martinez
•I'm super skeptical. The IRS phone system is notoriously terrible. There's no way some service can magically get through when millions of people are trying. Sounds like you're just trying to promote something.
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Sofia Torres
•It doesn't put you at the front of the line - it basically waits on hold for you. Their system dials repeatedly to get into the queue (which is often the hardest part with IRS lines being busy), then it holds your place and calls you when an agent picks up. It's not skipping any lines, just handling the frustrating holding process. I was skeptical too, but after wasting entire afternoons on hold only to get disconnected, I was desperate. It worked exactly as described - I registered my question, their system called the IRS, and about 35 minutes later I got a call that an agent was on the line. Much better than the 3+ hours I spent getting nowhere on my own.
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Ava Martinez
I take back what I said about Claimyr. I was genuinely convinced it was some scam, but I was completely stuck with an IRA conversion issue similar to yours that I couldn't get resolved. After trying for TWO WEEKS to reach someone at the IRS with no luck, I tried the service. Got a call back in about 45 minutes with an actual IRS rep on the line. They confirmed I was calculating my taxable portion correctly on my conversion and told me exactly which forms I needed. Saved me hours of frustration and probably a lot of tax mistakes. Can't believe I'm saying this, but it was totally worth it.
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Miguel Ramos
One thing nobody's mentioned yet - make sure you have good records of your original contributions. The whole "only pay taxes on the gains" thing depends on being able to prove you already paid taxes on the initial contributions. I learned this the hard way and had to pay taxes on the full conversion amount because I couldn't adequately document my non-deductible contributions from previous years.
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Liam Sullivan
•What kind of documentation should I keep? I have confirmation emails from my brokerage showing the contributions, and I have last year's tax returns. Is that enough?
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Miguel Ramos
•Confirmation emails are a good start, but you really want your account statements showing the contributions. Keep your Form 5498s that show IRA contributions for each year - these are usually sent out in May for the previous tax year. Your tax returns are crucial too, especially if you filed Form 8606 with them. If you didn't file 8606 forms for those non-deductible contributions, you should file amended returns to include them. Without the 8606 forms establishing your basis, it becomes much harder to prove which portions were already taxed.
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QuantumQuasar
Has anyone here used TurboTax to handle an IRA conversion? I'm in a similar situation and wondering if it walks you through Form 8606 correctly or if I should use a different software.
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Zainab Omar
•I used TurboTax last year for my backdoor Roth and it worked fine. The interview questions specifically asked about non-deductible contributions and IRA conversions. Just make sure you answer the questions about having a basis in your IRAs correctly. The one tricky part was making sure I entered the 1099-R information exactly as it appeared on the form.
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