I literally just went through this last week! For Line 4 (tax liability), I just used my 2022 tax return and found the line that said "total tax" (I think it was line 24 on the 1040). For line 5, I added up all the federal taxes from my paystubs for 2023 (look for "Fed Withholding" or similar). Line 6 was just the difference, and for line 7, I paid about half of what I owed just to be safe.

I completely feel your frustration! I was in the exact same boat last year - staring at Form 4868 like it was written in hieroglyphics. Here's what helped me understand it: Think of "tax liability" as your final grade on a test, and "payments" as all the homework points you already earned throughout the year. Line 4 is asking "what do you think your final tax grade will be?" and Line 5 is "how many homework points (tax payments) have you already earned?" Since you don't have your W-2 yet, here's a quick workaround: Look at your last paystub from December 2023. It should show your year-to-date federal tax withholding - that's your Line 5 number. For Line 4, if your income was similar to 2022, you can use last year's "total tax" from your 2022 return as a starting estimate. Don't stress too much about getting it perfect - the IRS knows these are estimates on extension forms. The key is making a reasonable good-faith effort. Once you get all your documents, you'll calculate the exact amounts on your actual tax return. Also, remember that filing an extension gives you until October to file your return, but if you owe money, you still need to pay by the original deadline to avoid interest charges. So it's better to overestimate a bit than underestimate!

This is a tricky situation that I've seen play out badly for families before. The math seems tempting - $12,500 difference in your tax refund - but you need to consider the full picture. Here's what could happen: Your sister's school could require your financial information during verification if they discover you're claiming her as a dependent. With your six-figure income, her Expected Family Contribution (EFC) would likely increase dramatically, potentially reducing her aid by much more than your tax savings. My suggestion would be to contact her financial aid office directly and ask them hypothetically: "If a sibling with [your income level] claimed the student as a dependent for tax purposes, how would that affect the student's aid package?" Don't mention it's your specific situation if you're uncomfortable, but get a concrete answer. Also consider that this isn't just about this year - if you start claiming her now, it creates a pattern that could affect her aid for the remainder of her college years. The short-term tax benefit might not be worth the long-term financial aid consequences. Have you calculated what her potential aid reduction might be with your income factored in? That comparison would give you the real numbers to make this decision.

I'm a tax preparer who deals with this exact situation every year, and unfortunately there's no clean way around it. The IRS and Department of Education communicate more than most people realize, especially during verification processes. Here's the reality: if you claim your sister as a dependent, you're legally stating that you provide more than 50% of her support. If her school selects her FAFSA for verification (which happens to about 30% of students), they'll see the discrepancy between who's listed as providing support on FAFSA versus who claimed her on taxes. Most schools will then require a "dependency override" process where they reassess her financial need based on ALL available family resources - including your income. With your six-figure salary versus your mom's $65k, her Expected Family Contribution could easily triple or quadruple. I've seen families lose $15,000+ in annual aid over a $10,000 tax benefit. The math rarely works out in favor of claiming the student, especially at schools that give significant need-based aid. My recommendation? Keep the status quo. Your mom claims her (if she meets the support test), your sister uses your mom's info on FAFSA, and you avoid the verification nightmare. The tax savings aren't worth potentially destroying her financial aid package for multiple years.

Don't forget about free resources! IRS Publication 17 (Your Federal Income Tax) is comprehensive and updated yearly. For investing, the Bogleheads wiki has excellent articles on tax-efficient fund placement. The book "The White Coat Investor" by James Dahle is aimed at doctors but has universally applicable tax strategies for high earners.

Great thread! I've been diving deep into tax education myself over the past year. One resource that really helped bridge the gap between reading books and practical application was "The Tax and Legal Playbook" by Mark Kohler. What I love about Kohler's approach is that he explains not just WHAT the strategies are, but WHY they work legally and HOW to implement them step by step. He covers everything from basic deductions to more advanced strategies like setting up LLCs for tax benefits. I'd also recommend supplementing whatever books you choose with the IRS's own educational materials - specifically their "Tax Benefits for Education" and "Retirement Plans" publications if you're looking at those areas. They're dry but authoritative. One thing I learned the hard way: start with ONE book, implement what you learn for a tax year, then move to more advanced strategies. I made the mistake of trying to absorb everything at once and ended up more confused than when I started! The combination of Wheelwright's "Tax-Free Wealth" for philosophy and Kohler's book for practical steps has been really powerful for me.

This situation is unfortunately becoming more common since PayPal lowered their 1099-K reporting threshold to $600. Many casual sellers are getting confused about their tax obligations and mistakenly trying to pass those concerns onto buyers. To be absolutely clear: you should NOT pay any additional money. The seller is confusing two completely different things: 1. **Income tax reporting** - PayPal reports their earnings to the IRS via 1099-K, which might affect the seller's personal income tax return 2. **Sales tax collection** - A separate obligation that typically only applies to registered businesses, not casual individual sellers Even if sales tax were somehow required (which it probably isn't for a private transaction), it should have been clearly itemized in the original invoice before you paid. You can't retroactively add taxes after a completed transaction. The seller's potential tax obligations are their responsibility, not yours. You paid the full invoiced amount as agreed - the transaction is complete. I'd recommend a polite but firm response explaining that any tax concerns they have are separate from your completed payment of the agreed-upon invoice amount. Don't let them pressure you into paying extra money for their confusion about tax rules!

This is a really comprehensive discussion that covers all the key points! As someone who's had to navigate similar PayPal tax confusion, I want to emphasize one additional point that might help others in similar situations. When you receive a PayPal invoice, that document represents a complete agreement between buyer and seller. The seller had the opportunity to include all applicable taxes, fees, and charges before sending it to you. By accepting your payment in full, they've completed the transaction as agreed. If they genuinely forgot to include required taxes (which, as everyone has explained, probably doesn't even apply to casual personal sales), that's an error on their part that they need to absorb, not pass on to you retroactively. Professional businesses understand this principle - you can't come back after a completed sale asking for more money because you made a mistake in your pricing or tax calculations. Your instinct to decline is absolutely correct. You've fulfilled your obligation completely by paying the invoiced amount. The seller needs to handle their own tax concerns (whether real or imagined) through proper channels - consulting with tax professionals, contacting the IRS, or using legitimate tax services - rather than trying to collect additional money from buyers after transactions are complete.

I've been working as a tax preparer for small businesses for the past 8 years, and this thread is absolutely crucial reading for anyone considering S corp election. Your CPA is definitely mixing up two different March deadlines, and this confusion could cost you thousands. Let me break this down clearly: Form 2553 (S corp election) must be filed by March 15, 2025 for S corp status to apply to your entire 2025 tax year. The March 2026 date is when you'll file Form 1120S (your actual tax return for 2025). These are completely different deadlines! I see this mistake all the time, and it's heartbreaking because the financial impact is so severe. Missing that March 15, 2025 deadline means waiting until 2026 for S corp benefits, which typically costs business owners $3,000-$15,000+ in additional self-employment taxes depending on income level. A few additional tips from my experience: File Form 2553 by early February to give yourself buffer time - the IRS has zero flexibility on this deadline. Start setting up your payroll system now, even before your CPA meeting, because you'll need it ready to go immediately after filing the election. And definitely keep detailed documentation of how you determined your reasonable salary - the IRS has been scrutinizing salary vs. distribution ratios more closely in recent audits. Your instincts about the timeline are completely correct. Schedule that CPA meeting immediately and bring printed Form 2553 instructions showing the "2 months and 15 days" rule. This is too important financially to leave any confusion unresolved!

I'm really glad you posted this question because I went through almost the exact same confusion with my CPA last year! Your instincts are absolutely right - there's definitely a mix-up happening with those March deadlines. Your CPA is confusing the S corp ELECTION deadline (Form 2553 by March 15, 2025 for 2025 tax year) with the S corp TAX FILING deadline (Form 1120S by March 15, 2026 for your 2025 taxes). These are two completely different things, and waiting until March 2026 to file the election would mean you lose an entire year of S corp benefits! I made this same mistake initially and almost cost myself thousands in unnecessary self-employment taxes. The "2 months and 15 days" rule in the Form 2553 instructions is crystal clear - for calendar year businesses, that's March 15th of the year you want the election to take effect, not when you file taxes the following year. You're also absolutely correct about needing the election in place before taking distributions. You can't operate as an S corp without having filed Form 2553 first - that's asking for trouble with the IRS. I'd recommend printing out the Form 2553 instructions and having an urgent meeting with your CPA this week. Show them exactly where the deadline is stated and ask them to clarify which specific March deadline they were referring to. This is way too costly a mistake to leave unresolved. Trust your gut - you're right to question this timeline!