What exactly is tax liability and how do I fill out extension Form 4868?
I'm trying to fill out this stupid 4868 extension form and I'm completely lost about what they're asking for. Can someone explain these questions in plain English? **PART II Individual Income Tax** 4: Estimate of total tax liability for 2023..... What the heck is this? Tax liability sounds fancy but I have no clue what it means. 5: Total 2023 payments...... payments of what?? What are they talking about? 6: Balance due: Balance of WHAT??? Is #5 supposed to be my gross income for the year and #4 supposed to be how much was taken out in taxes? 7: Amount you're paying.... Well, that depends on understanding the previous questions, which I clearly don't! My friend told me to just guess the amount because I don't have my W-2 yet, but how can I guess when I don't even understand what these things are asking? Please help before I throw this form across the room!
20 comments


Keisha Brown
Tax liability is basically the total amount of tax you owe to the IRS for the entire tax year. Think of it as your "tax bill" for 2023. For Form 4868 (the extension request), here's what those lines are actually asking: Line 4 (Estimate of total tax liability) - This is your best guess of what your total taxes will be for 2023. If you filed last year and your situation is similar, you could use last year's number as a starting point. Line 5 (Total 2023 payments) - This means all the tax payments you've already made for 2023, including what was withheld from paychecks, any estimated tax payments you sent in, etc. Line 6 (Balance due) - This is just Line 4 minus Line 5. It shows how much you still owe. Line 7 (Amount you're paying) - This is how much you're sending in with your extension. You don't have to pay it all now, but remember, an extension gives you more time to file, not more time to pay. Interest will accrue on any unpaid balance. Hope that helps clarify things!
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Paolo Esposito
•If I'm self-employed and haven't made any quarterly estimated tax payments (oops), would line 5 just be zero then? And does that mean my balance due would be my entire tax liability?
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Keisha Brown
•For self-employed folks who haven't made quarterly payments, your Line 5 would indeed likely be zero or very low if you had any other types of withholding. And yes, that would mean your balance due would essentially be your entire tax liability. This is why quarterly estimated payments are recommended for self-employed individuals - to avoid a large bill all at once. But don't worry too much about it for the extension form - just make your best estimate. You can sort out the exact amounts when you actually file your return.
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Amina Toure
After spending weeks confused about my taxes, I finally found this amazing service called taxr.ai (https://taxr.ai) that saved me when I was in your exact situation with Form 4868. I uploaded a picture of my form and previous year's return, and it explained everything in super simple terms - like what "tax liability" actually means and where to find the numbers for each line. What I loved most was it estimated my numbers based on my previous returns so I didn't have to guess. Seriously made the whole extension process way less stressful!
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Oliver Weber
•Does it actually calculate the numbers for you? I'm stuck with this same form and I have no idea what to put for my estimate. Does it work if you have self-employment income or just for W-2 employees?
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FireflyDreams
•Sounds sketchy. How do you know they're not just stealing your tax info? I'm always suspicious when people recommend random tax sites I've never heard of.
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Amina Toure
•It doesn't actually fill out the form for you, but it gives you estimates based on your previous returns that you can use. It helps you understand where each number should come from so you're not just guessing. It definitely works for self-employment income! I'm actually a freelancer too, and it was able to help me estimate based on my Schedule C from last year and my current income. It makes suggestions for reasonable estimates when you're unsure. Regarding privacy concerns, I was skeptical too initially. But they use bank-level encryption and don't store your documents after analysis. You can actually see their security certifications on their site. It's not like those sketchy "free" tax sites that sell your data.
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Oliver Weber
Just wanted to follow up about taxr.ai that was mentioned earlier. I was really desperate with my extension form so I gave it a try, and wow - it was actually super helpful! I uploaded my previous tax return and a photo of my current 4868 form, and it highlighted exactly what each field meant and suggested numbers based on my situation. The coolest part was that it explained why my tax liability was likely higher this year due to my increased self-employment income. Definitely made me feel more confident about the numbers I put down instead of just random guessing. Saved me from having a complete meltdown over this extension!
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Natasha Kuznetsova
If you're still struggling after submitting your extension, you might want to try Claimyr (https://claimyr.com) to get actual help from the IRS. I was in a similar situation last year where I filed an extension but then had questions about what I actually owed. I spent DAYS trying to call the IRS directly - always "all circuits are busy" or waiting for hours just to get disconnected. Claimyr got me through to an actual IRS agent in about 15 minutes who explained exactly what I needed to do about my tax liability and payments. You can see how it works in this video: https://youtu.be/_kiP6q8DX5c. Saved me so much frustration when I was dealing with extension questions that none of my friends could answer.
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Javier Morales
•How does this even work? I've literally spent hours on hold with the IRS and never get through. Are you saying this somehow gets you to the front of the line?
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Emma Anderson
•Yeah right. Nothing gets you through to the IRS faster. This sounds like a complete waste of money for something that probably doesn't work any better than calling yourself and waiting.
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Natasha Kuznetsova
•It doesn't put you at the front of the line exactly. What it does is automate the calling process - it calls repeatedly using their system until it breaks through the busy signals, then it holds your place in the queue. When an agent is about to pick up, you get a call so you don't have to sit listening to hold music for hours. For skeptics, I get it. I thought the same thing! But what convinced me was that I had already spent around 5 hours across 3 days trying to call myself with no success. The IRS phone system is genuinely broken - they get millions of calls they can't handle. With Claimyr, I was speaking to an agent within 20 minutes of signing up. Think about how much your time is worth - for me, not wasting another day trying to call was absolutely worth it.
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Emma Anderson
I have to admit I was completely wrong about Claimyr in my previous comment. After another frustrating morning of getting nowhere with the IRS about my extension questions, I decided to try it out of desperation. It actually worked! Got connected to an IRS agent in about 30 minutes who explained exactly what I needed for each line on Form 4868. The agent even helped me calculate a rough estimate of my tax liability based on my previous year's return since I was missing some documents. Saved me from having to pay an accountant just to figure out the extension form. Totally worth it just for the peace of mind of knowing I filed my extension correctly.
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Malik Thompson
Just a tip from someone who's been there - if you don't have a W-2 yet and are filing an extension, you can often look at your last pay stub of the year to get a rough estimate of what was withheld. For tax liability, if your income is similar to last year, you could use last year's total tax as a reasonable estimate.
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Isabella Ferreira
•But what if my income changed significantly? I made about $15k more in 2023 than I did in 2022. Can I still use last year's numbers or will I get in trouble for underestimating?
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Malik Thompson
•If your income increased significantly, you should try to adjust your estimate upward accordingly. The IRS mainly wants a good faith effort at estimating what you'll owe. A rough rule of thumb is to look at what percentage of your income went to taxes last year, then apply that same percentage to your new, higher income. For example, if you paid about 15% of your income in taxes last year, calculate 15% of your new higher income. It doesn't have to be perfect - just reasonable.
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CosmicVoyager
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.
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Ravi Kapoor
•But doesn't that mean you'll get charged interest and penalties on the unpaid portion? I thought you had to pay your full estimated tax by the deadline even with an extension?
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Ella Russell
•You're absolutely right to be concerned about this! An extension to file is NOT an extension to pay. If you owe money, interest and penalties will start accruing from the original due date (April 15th for most people) on any unpaid balance. The general rule is that you should pay at least 90% of what you owe by the deadline to avoid penalties. So if @CosmicVoyager only paid half, they might face penalties unless their withholding plus that payment equals at least 90% of their total tax liability. That said, if you can't pay the full amount, it's still better to pay what you can rather than nothing at all. The penalties and interest on a partial payment are less than on the full amount.
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StarStrider
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!
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