Oh that's really good to know. I actually have a side gig in addition to my main job, but they're both withholding OASDI. How do I figure out if I've overpaid? Do I just add up the OASDI from both W-2 forms?

Yes, you just add up the OASDI tax amount (box 4) from all your W-2 forms. If the total exceeds $10,740 (for 2025), then you've overpaid and can claim the difference as a credit. Just make sure you're only looking at the employee portion. Some people mistakenly include both the employee and employer portions when calculating this, but you can only get a refund on what you personally paid over the limit.

Haha same! It's like a little year-end bonus. I actually think of it as forced savings that gets "returned" to me near the holidays.

Exactly! It comes right when holiday shopping starts ramping up. Not a huge amount extra but definitely noticeable and appreciated!

Thanks for mentioning Form 3921! I do have that form and have been keeping it with my tax documents. One question though - when reporting the sale, do I need to reference this form or attach anything special to my return? Or do I just use it to determine my cost basis when filling out Schedule D?

You don't need to attach Form 3921 to your return or reference it specifically. It's primarily for your records to help you accurately report the transaction. You'll use the information from it to determine your cost basis when filling out Schedule D. When you sell, your brokerage will report the sale on Form 1099-B, but often they don't have your correct cost basis for ISO shares, so you may need to make an adjustment. That's where your Form 3921 comes in handy - it has the correct information for your cost basis (what you paid when exercising).

I used TurboTax Premier last year for my ISO sales and it worked fine. There's a specific section for stock options and it walks you through the process. Just make sure you have all your documentation ready (exercise price, date of exercise, sale price, etc). The key is entering the correct cost basis.

This is super helpful! I do have some stock purchases from around 2007-2008 that I'm still holding. Sounds like I should definitely keep those returns. Do you recommend physical copies, digital, or both?

For stock purchases you're still holding, definitely keep those records until at least 7 years after you sell. The basis information is crucial for calculating your eventual capital gains/losses. I strongly recommend both physical and digital copies for your most important documents (like the OIC, home purchase, and investment records). For the rest, properly encrypted digital copies are usually sufficient. Just make sure you have multiple backups - I've seen too many clients lose everything in a hard drive crash. Cloud storage plus an external hard drive gives you good redundancy.

Yes! This happened to me too! Needed info from my 2012 return and the IRS said they couldn't provide a transcript. The IRS representative told me they "might" have the actual return available but I'd need to pay $43 for a copy and wait 6-8 weeks. Definitely keep your own records.

How much does a cost segregation study typically run for a smaller commercial property? I've heard they're expensive but worth it for larger properties. Is there a minimum building value where it makes sense?

For smaller commercial properties, cost segregation studies typically run between $5,000-$8,000, depending on the complexity. The general rule of thumb is that the property should be valued at a minimum of $750,000 to make it worthwhile, but that can vary. The ROI calculation depends on your tax bracket and how much can be reclassified to shorter depreciation schedules. In my case, with a $1.2M property, the study cost $6,500 but identified about $280,000 in components that could be depreciated over 5-15 years instead of 39 years. That accelerated depreciation schedule created about $37,000 in tax savings in just the first year, so it paid for itself multiple times over.

The mixed-use aspect complicates things but doesn't prevent a 1031 exchange. You'll need to carefully document the percentage used for each purpose. If the entire property was always used for business (not personal), you should be eligible for a full 1031 exchange regardless of the specific business use.

How would I even approach this conversation with my manager? I'm not sure they'd understand what I'm asking for. Are there specific terms or IRS codes I should mention?

I'd suggest approaching it from the angle that it could benefit both you and the company. Something like: "I've been researching our current vehicle arrangement, and I found a potential way to make it more tax-efficient for both of us through a qualified transportation fringe benefit program under IRC Section 132(f)." Mention that this could reduce the company's payroll tax liability while also increasing your take-home pay. HR departments are usually familiar with these programs - they're similar to how commuter benefits work in many companies. If your manager isn't familiar, suggest a conversation with HR or payroll to explore the option. Come prepared with the estimated savings for both sides if possible.

My company did this last year! The key was showing HR the math on how much THEY would save on payroll taxes. For every $100 in pre-tax benefits, they save around $7.65 in employer-side payroll taxes. Our fleet has 38 vehicles so it added up fast. I brought a simple spreadsheet showing the annual savings and suddenly they were interested! The payroll system change was minimal on their end.