Don't forget to designate your own beneficiaries for this inherited IRA right away! I learned this the hard way - if something happens to you before the account is depleted, it creates an even more complicated situation for your heirs. Just had to deal with this with my mom's inherited IRA after she passed away.

One thing I'd add that hasn't been mentioned yet - make sure you understand the "stretch" provisions that were eliminated by the SECURE Act in 2019. If you're reading older articles or getting advice from people who dealt with inherited IRAs before 2020, they might reference being able to "stretch" distributions over your lifetime, but that's no longer allowed for most beneficiaries. Also, since you mentioned discovering the account 14 months after your aunt's death, you'll want to move quickly. Even though you have flexibility in how you take distributions over the 10-year period, there are some time-sensitive actions you need to take. The inherited IRA needs to be established and titled correctly, and if your aunt had any required minimum distributions for the year she passed away that weren't taken, those need to be addressed soon to avoid penalties. I'd recommend getting the account properly set up as an inherited IRA first, then working on your distribution strategy. The clock on that 10-year period started ticking when your aunt passed away, not when you discovered the account.

One additional resource that might be helpful is the SEC's EDGAR database. You can search for IBM's Form 8-K filings from late 2021 which should contain the official details about the Kyndryl spin-off, including the exact distribution ratio and valuation methods used. I had a similar issue with a Verizon/Frontier spin-off a few years ago, and finding the original SEC filing gave me the definitive documentation I needed to convince my broker to make the corrections. The Form 8-K will typically include a section called "Material Agreement" or "Other Events" that describes the distribution terms in detail. Also, if you're still having trouble after trying all the excellent suggestions here, consider filing a complaint with FINRA if Fidelity refuses to correct obviously incorrect cost basis information. Brokers are required to maintain accurate records, and persistent refusal to fix clear errors can sometimes prompt faster resolution when regulatory pressure is involved. The key is being prepared with multiple sources of official documentation - the Kyndryl website allocation info, IBM's SEC filings, and any IRS forms the companies filed. Having that comprehensive paper trail makes it very difficult for a brokerage to claim the correction isn't warranted.

I just wanted to thank everyone who contributed to this thread - the collective knowledge shared here is absolutely incredible! As someone who was completely overwhelmed by this IBM/KD cost basis issue when I first posted, I now feel like I have a comprehensive roadmap for getting it resolved. The step-by-step guidance from folks who've been through the exact same situation, the professional insights from the CPA, the practical tips about timing calls to Fidelity, and the additional resources like SEC filings - this is exactly the kind of detailed, actionable advice that makes online communities so valuable. I'm planning to tackle this systematically using the approach outlined here: gather all the official documentation (IBM's spin-off materials, SEC Form 8-K, Form 8937 if available), create a detailed spreadsheet showing my original purchases and the proper 96%/4% allocation, then call Fidelity's cost basis department during off-peak hours and ask specifically about corporate action notifications for the IBM/KD spin-off. I'll definitely follow up in this thread once I get it resolved to let others know how it goes. Based on everyone's experiences, it sounds like persistence and having the right documentation should do the trick, but knowing about the FINRA complaint option as a backup is reassuring too. Thanks again to this amazing community for turning what felt like an impossible problem into a manageable process with clear next steps!

Wow, this thread is amazing! Thank you all for such detailed advice. I'm honestly a bit overwhelmed by how many great resources there are - I was expecting maybe one or two app recommendations and instead got a whole education roadmap! I'm definitely going to start with the VITA training materials and IRS Interactive Tax Assistant to build my foundation, then move on to practicing with TurboTax for the educational content. The idea of working through last year's documents (once I get them from my parents) and then trying different scenarios is brilliant. A few follow-up questions if anyone's still reading: - How long should I expect this learning process to take? I want to be realistic about timing. - Should I focus on understanding just the basics first, or try to learn about more advanced stuff like itemizing even if I probably won't need it yet? - Any red flags I should watch out for when practicing to make sure I don't accidentally mess something up? You've all been incredibly helpful - this community is the best! I feel so much more confident about tackling this independence milestone now.

This is such a fantastic thread! As someone who works in tax preparation, I love seeing young people take initiative to learn this stuff properly instead of just winging it. One resource I haven't seen mentioned that's absolutely gold for beginners is **Tax Brain** (https://taxbrain.com) - it's a free tax calculator where you can input different scenarios and see exactly how changes affect your refund or tax owed. It's perfect for those "what if" scenarios people mentioned, like "what if I contribute to an IRA" or "what if I have student loan interest." The cool thing about Tax Brain is it shows you the math step-by-step, so you can actually see how deductions and credits work instead of just getting a final number. I use it with clients all the time to demonstrate tax planning concepts. Also, since you mentioned wanting to understand deductions and credits, create a simple checklist of common ones that might apply to students/young workers: student loan interest deduction, education credits, earned income credit (if applicable), retirement contributions, etc. As you practice with different software, see which ones you qualify for and why. This way you won't miss anything when you file for real! You're going to be so much better prepared than most people. Keep asking questions!

You're dealing with a really frustrating situation that goes beyond just tax filing - this is about fundamental financial responsibility and fairness in your marriage. From a purely tax perspective, filing separately would likely cost you both significantly more money. You'd face higher tax rates, lose access to many credits (potentially including the full Child Tax Credit), and miss out on the higher standard deduction for joint filers. The math usually shows couples paying $2,000-$5,000+ more annually by filing separately. But here's the thing - sometimes protecting your financial sanity is worth paying extra for. If your husband continues to refuse reasonable solutions like adjusting his W-4 or setting aside money monthly for taxes, then filing separately might be your way of establishing clear financial boundaries. You'd be saying "your tax choices are your responsibility" rather than enabling this pattern year after year. Before making that decision though, I'd suggest one final conversation with concrete numbers. Calculate exactly what filing separately would cost you both, then present it as: "We can either save $X by filing jointly with these conditions (proper withholding or monthly tax savings), or we can file separately and you handle your own tax debt." Sometimes seeing the real financial impact of their choices helps people understand the consequences. The bottom line is you shouldn't have to subsidize his poor financial planning indefinitely, regardless of which filing status you choose.

I've been through a very similar situation and want to share what actually worked for us. My spouse was also deliberately underwithholding, and I was getting tired of covering their tax debt every year while being responsible with my own withholdings. Here's what I learned: Filing separately is expensive but sometimes necessary for establishing boundaries. We actually did file separately for two years, and yes, it cost us about $3,200 more annually in taxes. But it was worth every penny because it forced my spouse to face the real consequences of their underwithholding choices. The key was being completely transparent about the decision. I showed them the math - "Joint filing saves us $3,200, but I'm not willing to subsidize your poor tax planning anymore. So we can either file jointly with you properly adjusting your W-4 and setting aside monthly tax money, or we file separately and you handle your own $7,000+ tax bill." After two years of paying significantly more in taxes AND dealing with their own large tax debt, they finally adjusted their withholdings. Now we file jointly again, but with clear agreements about tax responsibility. Sometimes you have to be willing to pay extra to establish healthy financial boundaries. The resentment from constantly bailing out a financially irresponsible spouse isn't worth the tax savings.

As someone who's also new to this community and dealing with IRS correspondence for the first time, I really appreciate how thoroughly everyone explained this situation! I'm 66 and will be filing my first tax return that includes Social Security benefits next year, so this whole thread has been like a masterclass in what to expect. The fact that TurboTax automatically switches to the 1040SR form for seniors is something I had no idea about. And knowing that CP12 notices are common for first-time Social Security filers actually makes me feel less anxious about potentially receiving one myself. One question for those with experience - is there a way to double-check the Social Security benefits calculation before filing to avoid these adjustments? Or is it just one of those things where you have to be extra careful with data entry and hope for the best?

As a newcomer to this community, I want to thank everyone for this incredibly detailed discussion! I'm 69 and have been receiving Social Security for a few years now, but I've been fortunate enough to avoid any IRS notices until recently. Reading through this thread helped me understand that my own CP12 notice (which I was panicking about) is actually pretty standard. Like the original poster, mine showed a zero balance after they adjusted my Social Security benefits calculation. I was so confused by the letter's wording, but seeing how common this is among seniors filing the 1040SR has put my mind at ease. The advice about keeping the SSA-1099 handy and reviewing Publication 915 is something I wish I'd known earlier. I've been relying entirely on TurboTax without double-checking the Social Security calculations myself. Definitely going to be more proactive about that going forward! It's reassuring to find a community where people take the time to explain these confusing tax situations in plain English. Looking forward to contributing more as I learn!