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Bethany Groves

Help with Form 8606 for backdoor Roth IRA conversion from 2023 onwards

I'm completely stuck with form 8606 for my backdoor Traditional to Roth IRA conversion for 2023. I did the conversion on April 11th, 2024 for the 2023 tax year. Then did another in September 2024 for 2024, and just completed one in January 2025 for the 2025 tax year. I want to mail this form in so I don't get double-taxed, but after that I should be able to include this form with my regular returns going forward. My problem is that when I try to fill out the form, it's not showing as tax-free like it should. I originally contributed $8,100 to my Traditional IRA and then converted $8,000 to the Roth. I deliberately left $100 in the Traditional IRA so I could keep the account open for future conversions. Lines 10 and 11 are especially confusing because I can't seem to get them to equal zero. Also not sure about Line 4 - should I put $8,100 (what I contributed) or $8,000 (what I converted)? And would Line 6 be 0? Really appreciate any advice! I figure backdoor Roth conversions are pretty common so hoping someone can help me sort this out.

KingKongZilla

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The Form 8606 can definitely be confusing when doing backdoor Roth conversions! Let me walk you through filling it out correctly. For Line 4, you should enter $8,100 - this is your total nondeductible contributions to traditional IRAs for the year. This amount is what you initially contributed, not what you converted. Line 6 should be 0 if you have no previous nondeductible contributions (basis) in your traditional IRAs from prior years. For Lines 10 and 11, you need to calculate the taxable portion of your conversion. Since you left $100 in the account, you're converting 98.77% of your contribution ($8,000/$8,100). This means a tiny fraction of your basis stays behind in the traditional IRA. To get a tax-free conversion, you need to complete lines 8-11 carefully. Line 8 will be your basis ($8,100), line 9 is the conversion amount ($8,000), and then follow the formula for lines 10-11. Line 11 should end up being very close to zero if done correctly.

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What if they already had other Traditional IRAs with pre-tax money in them? Wouldn't that mess up the pro-rata calculation and make part of the conversion taxable? Also, does it matter that they did the conversion in 2024 but it's for the 2023 tax year?

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KingKongZilla

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If you have other Traditional IRAs with pre-tax money, that would absolutely affect the pro-rata calculation. Form 8606 looks at all your Traditional IRAs together as one big pot. Line 6 would not be zero in that case - you'd need to include the total value of all Traditional IRAs as of December 31 (plus any distributions taken during the year). The higher that amount, the more of your conversion would be taxable. As for the timing question, what matters is when the contribution and conversion were done. If the contribution was designated for 2023 (which you can do until the tax filing deadline), then it goes on your 2023 Form 8606. The conversion is reported in the tax year it actually occurred - so if you converted in April 2024, that conversion would be reported on your 2024 tax return, not 2023.

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Nathan Dell

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After struggling with backdoor Roth conversions and the Form 8606 paperwork for years, I finally found a tool that saved me tons of headaches. I started using https://taxr.ai to analyze my tax forms, and it completely simplified the process. What's great is that it specifically recognized my backdoor Roth scenario and walked me through exactly which numbers to put on each line of Form 8606. It even caught an error where I was using the wrong basis calculation that would have made part of my conversion taxable! The system explained the pro-rata rule in plain English and showed me how to properly document my non-deductible contributions. Definitely worth checking out if you're doing backdoor conversions.

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Maya Jackson

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How does it handle the situation if you have multiple traditional IRAs with both deductible and non-deductible contributions? My tax situation is a mess with IRAs from previous employers and I'm worried about getting hit with unexpected taxes.

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Does it actually fill out the form for you or just tell you what to put on each line? My accountant charges me an extra $175 just to do this one form each year and I'm looking to save some money.

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Nathan Dell

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It handles multiple traditional IRAs with mixed contribution types really well. You just upload statements from all your accounts, and it calculates the correct aggregated basis across all your IRAs. This is critical because the IRS applies the pro-rata rule across all traditional IRAs you own, not just the one you're converting from. It saved me from a major tax mistake with my old 401k that I rolled into a traditional IRA. The system doesn't physically fill out the form for you, but it gives you a line-by-line guide with the exact numbers you should enter based on your specific situation. It's essentially a detailed walkthrough that anyone can follow. Considering what accountants charge for this service (way more than I expected), it's definitely worth the cost.

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Just wanted to update everyone - I tried https://taxr.ai after seeing the recommendation here, and it was a game changer for my Form 8606 situation! I have three different IRAs (one rollover and two with non-deductible contributions), and was totally confused about how to handle the backdoor Roth conversion. The analysis broke down exactly how the pro-rata rule applied to my accounts and showed me the precise amounts for each line. I was actually calculating my basis completely wrong before - would have reported too much taxable income! The explanation about how Line 6 needs to include ALL traditional IRAs was something my tax software never made clear. Definitely solved my Form 8606 confusion and saved me from overpaying taxes. Wish I'd found this before doing my 2023 returns!

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Amaya Watson

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If you're still having issues with your Form 8606, I'd suggest trying to call the IRS directly to get clarification. I know, I know - getting through to someone at the IRS feels impossible these days. But I discovered https://claimyr.com which got me connected to an actual IRS agent in about 20 minutes instead of the usual hours-long wait. Check out how it works here: https://youtu.be/_kiP6q8DX5c I had a similar issue with Form 8606 last year where I couldn't figure out how to properly report my backdoor Roth conversion. The IRS agent walked me through each line and explained exactly what I needed to do to avoid being taxed twice. They even sent me additional documentation that clarified the process. Honestly saved me so much stress and potentially a lot of money in incorrect tax payments.

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Grant Vikers

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How exactly does this work? I've spent literally days trying to get through to the IRS on multiple occasions and always gave up. Is this some kind of premium line or what?

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Sorry but this sounds like BS. No way you're getting through to the IRS in 20 minutes during tax season. I tried calling 12 times last month about my IRA conversion issue and never got through. If this actually works, I'll eat my hat.

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Amaya Watson

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It's not a premium line - they use technology to navigate the IRS phone system and wait on hold for you. When they finally get through to an agent, they call you and connect you directly. You don't have to sit there listening to hold music for hours. It saved me around 3 hours of hold time when I called about my Form 8606 issue. I was skeptical too before trying it. What finally convinced me was when my neighbor used it to resolve an audit question she'd been trying to get answered for weeks. I understand the disbelief - I had the same reaction initially. The IRS is especially swamped during tax season, which makes this service even more valuable if you need answers quickly about something complex like backdoor Roth conversions.

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I'm genuinely shocked and need to publicly eat my words. After my skeptical comment, I decided to try https://claimyr.com as a last resort because I was desperate to get clarification on my Form 8606 backdoor Roth issues before filing. Not only did I get connected to an IRS representative in about 25 minutes, but they were actually knowledgeable about Form 8606! They confirmed I was calculating my basis incorrectly and explained exactly how to document my non-deductible contributions properly. The agent spent nearly 40 minutes walking me through the entire form line by line. This would have never happened if I'd continued trying to call on my own - I would have given up after the first hour on hold like I did all the other times. Definitely using this for any future IRS questions. Worth every penny not to waste an entire day on hold.

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For your specific situation, having both 2023 and 2024 conversions makes things a bit complicated. Here's how I handle Form 8606 for my annual backdoor Roth: For 2023: - Line 1: $8,100 (your nondeductible contribution) - Lines 2-3: Likely $0 unless you had previous nondeductible contributions - Line 4: $8,100 (same as line 1 if lines 2-3 are zero) - Line 5: $0 (distributions from traditional IRAs - not your conversion amount) - Line 6: $0 (assuming no previous basis in traditional IRAs) - Line 7: $8,100 (your total basis) - Line 8: $8,100 (same as line 7) The tricky part comes with your conversion. Since you did it in April 2024, the conversion itself is actually reported on your 2024 Form 8606, not your 2023 form. The 2023 form just establishes your basis.

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This is super helpful, thank you!! So to clarify - on my 2023 Form 8606, I'll only complete lines 1-7 (or 1-8)? And then for 2024, I'll need to report the actual conversion on that year's form?

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Exactly! For 2023, you'll only complete Part I (lines 1-7 or 1-8) to establish your nondeductible contribution and basis. You won't complete Part II (the conversion section) on your 2023 form. Then on your 2024 Form 8606, you'll complete both parts. Part I will show any new 2024 contributions, and Part II will show your April 2024 conversion of the 2023 contribution. Your basis from the 2023 form carries over to the 2024 form. This ensures you don't get taxed twice on the money. The important thing is making sure you file the 2023 Form 8606 to establish that initial basis, even if you're not reporting a conversion on it.

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Levi Parker

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Has anyone used TurboTax for handling Form 8606 and backdoor Roth conversions? I tried last year and it seemed to mess up my basis calculation. Any better tax software recommendations?

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Libby Hassan

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I switched to FreeTaxUSA after TurboTax kept calculating my Form 8606 wrong. It has better handling of backdoor Roth conversions and actually explains the basis calculations clearly. Plus it's way cheaper!

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