Don't forget part-year resident returns! Since you moved to Idaho, you're a part-year resident there, and you were a part-year resident of the last state you lived in. Part-year returns can be tricky but they're designed to make sure you're only taxed once on each dollar you earn.

I went through a very similar situation a few years ago when I worked in multiple states! One thing that really helped me understand the double taxation issue was checking whether any of the states you worked in have reciprocity agreements with each other. For example, if you lived in Pennsylvania but worked in a neighboring state with a reciprocity agreement, you might only need to file in your home state. However, since you worked in Wisconsin, Nevada, and Pennsylvania, you'll likely need to check each combination. Also, keep all your W-2s handy and look at Box 17 (State income tax) on each one. If you see state taxes withheld, that state will expect you to file a return there. The key is that when you file multiple state returns, each state's tax software should ask about taxes paid to other states - that's where you claim the credit to avoid double taxation. Since Nevada has no state income tax, that's one less return to worry about! But definitely file in Wisconsin and Pennsylvania for the income earned there.

Just a heads up - I filed my Robinhood taxes myself last year using Credit Karma Tax and it messed up some of my wash sales. I ended up having to file an amended return. Make sure whatever software you're using properly handles wash sales if you've bought and sold the same stock within 30 days!

As someone who went through this exact situation last year, I'd strongly recommend double-checking that whatever free tax software you choose can handle investment income properly. Some of the truly "free" versions have limitations when it comes to investment reporting. I started with IRS Free File and quickly realized it wasn't going to cut it for my Robinhood trades. Ended up using FreeTaxUSA which was free for federal (small fee for state) and handled everything including some tricky wash sales that Robinhood flagged on my 1099. The key thing is to take your time when entering the information. Don't rush through it - investment income can get complicated fast, especially if you had a lot of trades. And definitely review everything twice before submitting. Better to spend an extra hour double-checking than to deal with an IRS notice later!

This thread has been incredibly helpful! I'm a tax professional and see this exact scenario multiple times every season. The $1,800 difference between your Box 1 and Box 16 is completely normal and actually a positive sign that you're maximizing your tax-advantaged benefits. What's happening is your pre-tax deductions (401k, HSA, health insurance premiums, etc.) reduce your federal taxable wages in Box 1, but many states don't recognize all the same pre-tax deductions, so your state wages in Box 16 remain higher. A couple additional points I'd add: First, if you're in a state like California, New York, or New Jersey, they're particularly strict about not allowing certain federal pre-tax deductions. Second, always save your final paystub from the year - it's the best way to verify your W-2 accuracy by comparing year-to-date totals. Your approach with TurboTax is perfect - just enter the numbers exactly as they appear. The software handles these federal/state differences seamlessly. You're actually saving money on federal taxes while building wealth for your future. Keep up the great financial habits!

I'm going through this exact same situation right now! Just received my W-2 and there's about a $1,650 difference between Box 1 and Box 16, with state wages being higher. Like you, I've been with the same employer for several years and this is my first time seeing this difference. After reading through all these helpful responses, I'm pretty confident it's because I started contributing to my company's HSA this year when they introduced the high-deductible health plan option. I also bumped up my 401k contribution from 5% to 7% during open enrollment. I had completely forgotten that these pre-tax deductions would reduce my federal taxable wages but might still be included in state wages depending on my state's tax laws. It's such a relief to see so many people explaining that this is totally normal and actually beneficial! I was initially worried there was an error on my W-2, but now I understand this difference is actually proof that I'm making smart financial moves by maximizing my pre-tax benefits. Going to double-check my final paystub against the W-2 numbers like several people suggested, but I feel much more confident about proceeding with my tax filing now. Thanks for posting this question - it's exactly what I needed to see to understand my own situation!

Dont forget about state taxes too!! Depending on your state, you might owe significant state taxes on that gain. Some states give preferential rates to capital gains, but many tax them as ordinary income at the state level.

Great thread everyone! As someone who went through a similar situation with a large inherited property sale, I want to emphasize a few key points that have been mentioned: 1. **Form 8949 → Schedule D → Form 1040 flow is correct** - Don't try to separate them. The tax software/worksheets handle the preferential rates automatically. 2. **Definitely make estimated payments** - With a gain that large, you're looking at roughly $1.5M+ in total taxes (federal + NIIT + state). The underpayment penalties on that amount would be painful. 3. **State taxes vary wildly** - Some states have no capital gains tax, others treat it as ordinary income. This could easily add another $500K+ to your tax bill depending on your state. 4. **Consider tax-loss harvesting** - If you have any other investments with losses, now might be the time to realize them to offset part of this gain. One additional tip: if this was inherited property, make sure you're using the stepped-up basis from the date of inheritance, not your grandparents' original purchase price. That could save you hundreds of thousands in taxes if the property appreciated significantly while they owned it. With this much money involved, definitely get professional help - either a CPA who specializes in high-net-worth situations or use multiple verification methods like the tools others mentioned. Better to spend a few thousand on professional advice than make a costly mistake!

I'm dealing with something similar and appreciate everyone sharing their experiences here. The stress of wondering "what if" has been eating me alive for months. After reading through all these responses, it seems like the consensus is pretty clear - coming forward voluntarily is almost always better than waiting to get caught. The penalties are lower, you avoid potential criminal charges, and you can actually sleep at night again. I'm curious though - for those who amended their returns, how did you handle the payment? Did you pay everything upfront or were you able to set up payment plans? The amount I'd owe is more than I can pay immediately, so I'm wondering what options the IRS typically offers for people in our situation. Also, has anyone here actually been audited for unreported income? I keep seeing advice about audit triggers and red flags, but would love to hear from someone who actually went through the audit process to understand what that's really like.

I've been following this thread as someone who went through a similar situation a few years back. The advice here is solid - voluntary disclosure really is your best option. One thing I want to emphasize that hasn't been mentioned much: document EVERYTHING when you prepare your amended returns. Keep records of all your income sources, bank statements, and any evidence of the cash deposits. The IRS appreciates thoroughness when you're coming forward voluntarily. Also, don't underestimate the psychological toll this takes. I was a wreck for months before I finally amended my returns. The relief you feel after taking care of it properly is incredible - it's like a huge weight lifted off your shoulders. Your situation with the capital losses potentially triggering scrutiny is definitely valid. The IRS has algorithms that flag discrepancies between reported income and financial activity. Better to address it on your terms rather than theirs. One last tip: if you do decide to work with a tax professional, make sure they specialize in IRS issues and have experience with voluntary disclosures. Not all tax preparers are equipped to handle these situations properly.