Careful with the home office deduction! I thought I could claim this too, but my accountant said if you're a W-2 employee (not self-employed), you can't take the home office deduction anymore after the 2017 tax law changes. Only applies if you're self-employed now.

You're absolutely right, and I should have been clearer. The home office deduction is only available if you're self-employed, an independent contractor, or gig worker. W-2 employees can't claim it anymore even if you work from home all the time. This was changed with the Tax Cuts and Jobs Act back in 2017. I'm self-employed so I still get to take advantage of it, but I shouldn't have assumed everyone's situation was the same. Thanks for the correction!

How do you know if they're separated correctly? My 1098 has a box for mortgage interest and another box for property taxes. Is that what you mean?

Is there any benefit to doing estimated payments vs just adjusting the W-4? Seems like more work for the same result?

For most W-2 employees, adjusting the W-4 is definitely simpler. The main benefit of estimated payments comes in if you have significant income outside your regular job (like investments, side gigs, rental property) or if your income varies a lot throughout the year. Estimated payments give you more control over exactly when you pay, which can help with cash flow management. Some people also like to keep more cash on hand during the year and then make larger payments close to the quarterly deadlines. But if you just have regular employment income, adjusting your W-4 is usually the easier route.

Claiming exempt is only legal if you had no tax liability last year AND expect to have no tax liability this year. Based on your $72k income, you definitely don't qualify. Your brother is likely setting himself up for penalties and a massive tax bill. The IRS doesn't mess around with people who don't withhold properly.

That's a good point about documentation. Do you recommend any specific apps for tracking mileage? And how detailed do I need to be with the log - just start/end odometer readings or do I need to note every stop?

I've had good luck with MileIQ and Everlance for tracking business mileage. Both automatically detect trips and let you classify them as business or personal. For audit protection, you'll want to record the starting and ending odometer readings, date, business purpose, and destination for each trip. You don't need to document every single stop if they're all part of the same business purpose, but you should note the overall trip details. The IRS loves to target vehicle deductions during audits, so good documentation is essential. Take photos of the odometer readings periodically as additional backup.

Leasing isn't always better for tax purposes though. With a lease, you can only deduct the actual payments made each year. When purchasing, even if you can't use Section 179, bonus depreciation might still give a larger first-year deduction. Plus owning builds equity.

Good point! I made this exact mistake. Tracked hundreds of volunteer miles and then my tax software showed it made zero difference to my return because I was taking the standard deduction anyway. Wish someone had told me sooner!

That's unfortunately very common! Many people don't realize that charitable deductions (including mileage) only benefit you tax-wise if you itemize. With the higher standard deduction after tax reform, fewer people benefit from itemizing unless they have substantial mortgage interest, state taxes, or other major deductions. For those who are close to the threshold where itemizing makes sense, tracking charitable mileage could potentially push you over that line. But if you're not near that threshold, it won't impact your tax return.

I haven't been audited specifically for that, but my accountant told me charitable mileage is rarely the trigger for an audit by itself. The key is having good documentation - a log with dates, starting/ending mileage, and the charitable purpose. Most audit flags come from unusual patterns or large deductions relative to income, not from reasonable volunteer expenses.

So wait, does that mean I should be rounding all the numbers on my tax return to the nearest dollar instead of including cents? I've been reporting down to the penny on everything for years!

Yes, the official IRS guidance is to round to the nearest dollar on your personal tax returns. If it's 50 cents or more, round up. If it's less than 50 cents, round down. This applies to Form 1040 and most related schedules. This is different from how the amounts might appear on your information returns like W-2s or 1099s, which sometimes include cents. But when you transfer those amounts to your tax return, you typically round each line to the nearest dollar. Most tax software does this automatically for you.

Yes, in some cases financial institutions are permitted to exclude de minimis amounts (very small values). There are specific thresholds for different types of income where reporting isn't required. For example, if interest income is less than $10, it generally doesn't need to be reported on a 1099-INT. For 1099-B forms specifically, there are complex reporting rules about small transactions. If your platform is zeroing out very small amounts, they're likely following applicable guidelines. Remember though, technically you're still supposed to report all income regardless of whether you received a form for it.