This thread has been incredibly comprehensive and helpful! I'm dealing with a similar situation with my mother's old stock certificates, and I wanted to share one additional approach that worked for us. If your dad ever used a financial advisor or investment firm in the past, even if he moved his accounts elsewhere later, they sometimes maintain archived client records that could include the original purchase information. I found records at an old Edward Jones office where my mom had briefly held an account in the early 2000s - they had notes about stock transfers from other accounts that included original cost basis information. Also, don't overlook checking with your state's unclaimed property division. Sometimes when old paper certificates get lost or forgotten, dividend payments or proceeds from corporate actions end up there with detailed records about the original holdings. For anyone still struggling with the AT&T to Warner Discovery calculation specifically, I used the exact 71%/29% allocation that's been mentioned throughout this thread and it worked perfectly. Just make sure you're applying it to the adjusted basis after accounting for all the splits and corporate actions between 1999 and 2022. The documentation advice everyone has given is spot on - I kept detailed records of every resource I tried, and it gave me confidence when filing. Between all the approaches mentioned in this thread (AT&T investor relations, Computershare, library databases, historical price research, old tax returns, and potentially consulting a CPA), you should be able to reconstruct a defensible cost basis even without the original purchase records.

I've been helping several family members with similar old stock situations, and this thread has covered most of the key approaches really well. One additional tip that saved me a lot of time: if you end up calling multiple departments (AT&T investor relations, Computershare, etc.), ask each representative for their direct extension or email if possible. I found that building relationships with specific people who understood my situation meant I could call back with follow-up questions without having to re-explain everything from scratch each time. The AT&T investor relations specialist I worked with even proactively sent me additional corporate action documentation when she found it in their system. Also, regarding the historical price research - don't forget to check if the purchase was made during a holiday period when markets were closed. December 1999 had some unusual trading days around Christmas/New Year's that could affect which date you use for the cost basis calculation. For anyone feeling overwhelmed by all these options, I'd recommend starting with the AT&T investor relations call first (1-800-348-8288, ask for "historical corporate actions"). That single call can often provide 70-80% of what you need to know, and then you can use the other approaches to fill in any gaps. The key is having that foundational information about splits and corporate actions before you start trying to reconstruct the original basis.

A little-known trick: if you make a large estimated payment in January of the following year (before filing), you might be able to apply it to the previous year's Q4 estimated payment. I've done this before when I realized I might face an underpayment penalty. The key is to specify on the payment voucher that you want it applied to the previous tax year's Q4 payment. This won't help with penalties from Q1-Q3 underpayments, but it can reduce the Q4 portion of any penalty.

This is such a common area of confusion! I went through the same thing last year with my mixed W-2 and consulting income. One thing that really helped me understand the penalty calculation was realizing that the IRS essentially wants you to "pay as you go" rather than catch up at year-end. So even if your total payments exceed your tax liability, you can still owe a penalty if those payments weren't distributed properly throughout the year. For your 2025 planning, increasing withholding is definitely the right move since it's treated as paid evenly throughout the year. But don't completely eliminate estimated payments if your self-employment income is substantial - you might just need to adjust the timing and amounts. Also worth noting: if your prior year tax liability was under $1,000, or if this is your first time owing an underpayment penalty, you might qualify for first-time penalty abatement even after filing. The IRS is surprisingly reasonable about waiving penalties for taxpayers with good compliance history.

As someone new to this community, I wanted to add my perspective on this clean vehicle credit transfer situation. I'm a tax professional who has been helping clients navigate this exact issue all season long. The confusion is completely understandable because the IRS essentially created a new process (dealer transfers) but didn't adequately update the forms and instructions to reflect it. What's happening is that Form 8936 and its instructions were originally designed for taxpayers who claim the credit directly on their returns. When the transfer option was added, the forms weren't comprehensively updated to address the "transfer scenario." Here's the technical explanation: When you transfer the credit to a dealer, you're executing what's essentially an assignment of your tax benefit. The dealer then files their own Form 8936 claiming the credits they've "purchased" from customers. Your SSN gets reported on their form, which is why you receive the IRS confirmation notice - it's acknowledgment that your credit was properly transferred and claimed by the dealer. From a compliance standpoint, you absolutely should NOT file Form 8936 if you transferred the credit. Doing so would constitute double-claiming the benefit, which could trigger penalties and interest. The system is designed as either/or - you claim it yourself OR you transfer it, never both. For documentation purposes, I recommend clients create a simple note for their tax files stating "Clean Vehicle Credit transferred to [Dealer Name] on [Date] - not claimed on return per IRS guidance." Keep this with your dealer paperwork and IRS notice. This thread has been fantastic for clarifying a very common point of confusion this tax season!

As a newcomer to this community, I want to thank everyone for this incredibly thorough discussion! I was facing the exact same situation with my 2024 clean vehicle credit transfer and was about to make the mistake of filing Form 8936. I purchased a new EV in December 2024 and transferred the full $7,500 credit to the dealer. Like many others here, I received all the documentation and felt like I needed to report something on my tax return. The IRS confirmation notice made it seem like I should be doing something with Form 8936, but the instructions were completely unclear about the transfer scenario. After reading through all these responses, I'm convinced that skipping Form 8936 entirely is the right approach. The explanation about the credit being an "assignment of tax benefit" really helped me understand why there's nothing left for me to report once the transfer is complete. I'm particularly grateful for the professional perspective from Mateo Rodriguez and the practical documentation tips. I'll definitely be adding a note to my tax files explaining that the credit was transferred and not claimed on my return. This thread should be required reading for anyone dealing with clean vehicle credit transfers! It's clear the IRS needs to update their forms and instructions, but until then, discussions like this are invaluable for helping taxpayers navigate the confusion.

I had a very similar situation last year where my taxable income was lower but I ended up owing taxes instead of getting a refund. The culprit turned out to be a combination of factors that weren't immediately obvious. First, definitely double-check that Box 12 parser issue you mentioned. I've seen parsers misread codes like "D" (401k contributions) as "DD" (employer-sponsored health coverage), which can dramatically affect your taxable income calculation. Second, when you changed jobs mid-year, did your new employer know about your previous year-to-date earnings? Often they don't, so they calculate withholding as if your new job salary is your only income for the entire year. This frequently results in under-withholding. Also check if you had any life changes that affected your tax situation: got married/divorced, had a child, moved states, or changed health insurance. Even small changes in pre-tax deductions like health insurance premiums or 401k contributions between employers can shift your taxable income enough to change your tax bracket. For Line 23, look specifically at whether you did any gig work, sold investments, or withdrew money from retirement accounts this year that you didn't do last year.

I went through something very similar last year and it was incredibly frustrating! The good news is that Line 16 is actually pretty straightforward - it's just pulling directly from the IRS tax tables based on your taxable income on Line 15. What I found was that even tiny changes in my situation created a domino effect. In my case, I had switched from contributing to a traditional 401k to a Roth 401k mid-year without realizing it would increase my taxable income (traditional contributions reduce taxable income, Roth doesn't). That small change pushed me into a higher tax bracket. Since you mentioned the W-2 parser potentially misreading Box 12, definitely manually verify those entries. I've seen parsers confuse retirement contribution codes with other codes, which can swing your tax calculation by hundreds or even thousands of dollars. For Line 23, check if you did any side work, even small amounts. If you earned more than $400 in self-employment income, you'd owe self-employment tax that shows up there. Also, did you cash out any vacation time when you left your previous job? Sometimes that gets taxed differently and can create unexpected tax obligations. The job change mid-year is probably the biggest factor though. Your new employer's payroll system likely calculated withholding based only on your new salary, not accounting for the income you'd already earned. This almost always results in under-withholding.

As a tax professional who's been through the software selection process multiple times, I'd echo the recommendations for Drake or TaxAct Pro for your situation. Both are solid choices that won't overwhelm you as a beginner while still being capable enough to handle your expected client mix. One thing I'd add that hasn't been mentioned much - consider the software's diagnostic and error-checking capabilities. When you're new, having software that catches potential issues and explains them clearly can be a huge lifesaver. Drake excels at this with very clear diagnostic messages, while some of the higher-end options assume you already know what various error codes mean. Also think about your workflow preferences. Some preparers love the interview-style approach (great for ensuring you don't miss anything), while others prefer the forms-based method once they're comfortable. Most software offers both, but some do one style much better than the other. Given your 40-50 return volume and mix of return types, you're in that sweet spot where mid-tier software makes the most financial sense. You can always upgrade in future years as your practice grows - and by then you'll have a much better sense of what features matter most to your specific workflow and client base. Good luck with your EA exam! That credential will serve you well in building client trust.

I've been doing tax prep for about 6 years now and want to echo what others have said about Drake being an excellent choice for someone in your situation. What really sold me on Drake when I was starting out wasn't just the price point, but their comprehensive training program. They offer free webinars throughout the year, not just during tax season, which helped me stay current on tax law changes. Their knowledge base is also really well-organized - when you're stuck on something at 9 PM during busy season, being able to quickly find clear explanations and examples is invaluable. One practical tip: whichever software you choose, set up your practice with a few test returns during the off-season using your own tax situation or family members' returns from previous years. This lets you get comfortable with the software's flow without the pressure of client deadlines. I did this with Drake and it made my first real tax season so much smoother. Also, don't underestimate the value of software that integrates well with tax research tools. As you're building your expertise, having quick access to reliable tax resources from within your software can be a real confidence booster when you encounter something unfamiliar. Drake handles this integration really well. Best of luck with your EA exam and your new practice! The combination of good software and that credential should set you up nicely for success.