Great question! I went through this exact same situation last year. You're absolutely allowed to use two different EFINs in the same tax year - it's actually pretty common for tax professionals who work for firms but also do some independent preparation work. For the income reporting, yes, anything you earn using your personal EFIN should be reported as self-employment income on Schedule C. Make sure to track all your business expenses like software costs, office supplies, and if you're working from home, potentially home office deductions. One thing I'd add that others haven't mentioned - consider getting your own errors and omissions (E&O) insurance for your personal EFIN work. Your employer's insurance likely won't cover returns you file independently. Also, keep really good records separating your two practices - separate client files, separate banking if possible, and clear engagement letters so there's no confusion about which capacity you're working in. The IRS actually expects this kind of arrangement and has procedures in place for it. Just make sure you're not violating any employment agreements with your firm!

Adding to what others have said about the dual EFIN setup - you're definitely good to go from a compliance standpoint. I've been doing this for about 3 years now (working at H&R Block during the day, personal EFIN for evenings/weekends) and have never had any issues with the IRS. One practical tip that's helped me a lot: set up completely different workflows for your two practices. I use different intake forms, different client management systems, and even different physical spaces in my home office. This makes it crystal clear which "hat" I'm wearing for each client and helps avoid any potential conflicts or confusion. Also, don't underestimate the time commitment for your personal practice. Between client meetings, return preparation, and all the administrative stuff (invoicing, follow-ups, etc.), it adds up quickly. I started with just a few family members and friends, but word spreads fast once you do good work. Make sure you're prepared to scale up your systems if demand grows!

This is a great discussion that touches on something I dealt with recently. One thing worth considering is the interaction between QBI losses and the overall Section 199A deduction limitation based on your taxable income. Even if you do generate future QBI to offset those carryforward losses, remember that the Section 199A deduction is still limited to 20% of your taxable income minus net capital gains. So if you're earning W2 income and have other deductions that reduce your taxable income significantly, you might not be able to fully utilize the QBI benefit even when you do have positive qualified business income. I learned this the hard way when I started a small side business thinking I could immediately benefit from my old QBI losses. The math worked out differently than I expected because of the taxable income limitation. It's another factor to consider when deciding whether to keep a dormant business alive or just close it cleanly. Also, regarding the state-level complications others mentioned - some states don't follow federal QBI rules at all, so you could be maintaining a business entity for federal tax benefits that don't even apply at the state level where you might owe annual fees or taxes.

The discussion here highlights just how complex QBI carryforwards can be in practice. I've been following a similar path - had QBI losses from a small manufacturing business that I wound down in 2021, and I've been wrestling with whether to maintain the entity. One aspect that hasn't been fully explored is the record-keeping burden of maintaining those carryforward losses over multiple years. The IRS expects you to be able to substantiate the original loss calculations if you ever use them, even years later. I've had to maintain detailed records of inventory valuations, asset dispositions, and final-year operating expenses that generated those losses. Also, if you're considering Muhammad's suggestion about starting a different type of business to utilize the losses, be aware that the character of the income matters. Some activities that might seem like "business income" could actually be classified differently for QBI purposes. For instance, if you start doing consulting that's considered a "specified service trade or business" under Section 199A, there are income limitations that could affect your ability to claim the deduction even with the carryforward losses. The practical reality for most people in W2 employment is that these QBI losses become "stranded assets" - technically valuable but practically unusable. Sometimes the cleanest approach is to close the business properly and move on, rather than maintaining it in hopes of someday utilizing losses that may never provide real benefit.

I've been following this thread and want to add some practical advice from my experience working in tax preparation. The support test calculations can seem overwhelming, but there's a systematic way to approach this. Create a simple monthly budget tracking sheet with two columns: "I pay" and "Parents pay." Include everything - rent, utilities (your estimated share), food, transportation, insurance, medical, education, clothing, entertainment, phone, etc. Multiply by 12 for annual totals. For your situation with cash rent payments, the IRS Publication 17 specifically mentions that you can use "reasonable estimates" when exact records aren't available. Your regular ATM withdrawals that match your rent amount, combined with a simple written statement from your dad acknowledging the arrangement, would be considered reasonable documentation. One often overlooked factor: if you're paying your dad $175/week for rent, that's actually market-rate documentation that you're providing your own housing support. Most parents charging a dependent child would charge much less or nothing at all. Also, don't forget that any financial aid or scholarships you receive don't count as support from your parents - they count as support you provided for yourself. This can significantly tip the scales in your favor. The bottom line: if your calculations show you provide more than 50% of your total support, file your return claiming yourself. The education credits alone could be worth $2,500, which likely exceeds any benefit your parents would get from claiming you.

I'm a CPA and want to emphasize something crucial that might get overlooked in all this discussion about documentation and worksheets: the IRS dependency tests are objective, not subjective. Your parents don't get to "choose" who claims you based on family dynamics or who feels entitled to the deduction. Based on what you've described - paying $9,100/year in rent, covering your own groceries, car insurance, and personal expenses, plus working 30 hours a week - you almost certainly provide more than half your own support. The fact that your mom pays tuition doesn't automatically disqualify you from claiming yourself. Here's what I'd recommend: Complete IRS Worksheet 3-1 in Publication 501 (the official support test worksheet). This will give you the exact calculation the IRS would use if there's ever a dispute. If you provide more than 50% of your total support, you SHOULD claim yourself - it's not optional, it's the correct filing status under tax law. Also, since you mentioned you're 24 and a full-time student, make sure you understand that you can only be claimed as a "qualifying child" if you're under 24 AND a full-time student. If you don't meet the qualifying child test, your parents would have to prove you're a "qualifying relative," which has even stricter support requirements. File your return first and claim yourself if the numbers support it. Let your parents deal with the rejection if they try to claim you incorrectly.

I'm working on a similar problem for my small business. Looking at these numbers: If gross assets went from $9.8M to $13.5M (+$3.7M) but accumulated depreciation decreased by $2.55M, doesn't that suggest they got rid of old assets and bought way more new ones?

This is a great discussion! I've been wrestling with similar Schedule L calculations for my consulting practice. One thing I'd add is that when you see that dramatic decrease in accumulated depreciation ($8.75M to $6.2M), it's almost certainly indicating major asset disposals. For a more complete capex calculation, you might want to try working backwards: 1) Start with the $3.7M increase in gross PPE (new acquisitions minus disposals at cost) 2) Estimate the original cost of disposed assets by looking at the accumulated depreciation reduction 3) Add back the estimated disposal amount to get total new purchases In your case, if they disposed of assets with $2.55M in accumulated depreciation, those assets likely had a much higher original cost. Without more details from other forms, it's hard to pin down the exact capex amount, but it's definitely more than the $3.7M net increase in gross assets. Have you checked if there's a Form 4797 (Sales of Business Property) that might give you more clarity on the disposals?

Just wanted to add my experience since I went through this exact same thing a few months ago! My tax code changed from 1257L to 1100L seemingly out of nowhere, and I was really stressed about the extra tax I'd be paying. After following the advice that others have shared here (checking the Personal Tax Account first), I discovered it was because I'd earned about £800 from some tutoring work that I'd declared on my self-assessment earlier in the year. HMRC had automatically adjusted my tax code to collect the tax on this additional income throughout the year rather than in one lump sum. What really helped me was understanding that this is actually HMRC trying to be helpful - they spread the tax burden across your monthly payments instead of hitting you with a big bill later. Once I realized this, the change made perfect sense. The Personal Tax Account really is the best first step - it saved me hours on the phone and explained everything clearly. For anyone else in this situation, don't panic! These adjustments usually have logical explanations once you know where to look.

I've been following this thread with great interest as I'm dealing with a similar situation myself - my tax code recently changed from 1257L to 1095L and I was completely puzzled until reading everyone's experiences here. What's been most helpful is seeing how common these unexpected changes actually are, and that they usually have straightforward explanations once you know where to look. The consistent advice about checking the Personal Tax Account first seems like the smart approach - it's free, available 24/7, and apparently gives you the detailed breakdown you need without waiting on hold. For anyone else reading this who's in the same boat, I found it really reassuring to learn that these adjustments are often HMRC trying to be proactive rather than punitive. They're spreading potential tax liabilities across the year instead of hitting you with a surprise bill later. The practical tips about calling at 8am if needed, and having documents ready, are gold. It's clear this community has some really knowledgeable people who've been through these situations before. Thanks to everyone who's shared their experiences - it's making what seemed like a scary situation much more manageable!