Does your employer know you do this? I'm worried mine would think I'm violating some non-compete if I tell them I need extra withholding for my side business.

Your employer doesn't need to know why you're adjusting your withholding. When you fill out a new W-4, you can either claim fewer allowances or simply specify an additional dollar amount to withhold from each paycheck. There's no requirement to explain why you want more taxes withheld. Many people adjust their withholding for various reasons - maybe they have investment income, rental property, or just want a bigger refund. The payroll department processes the change without needing an explanation.

Where do you find the estimator? I've been all over the IRS site and can't find anything helpful.

I haven't been getting pay stubs! That's part of the problem - they just direct deposit the money and when I've asked for stubs they say "we'll email them" but never do. Is that even legal? How do I know if they're actually sending the money to the IRS if I don't get pay stubs?

That's concerning. Employers are legally required to provide either electronic or paper pay statements in most states. If they're not providing pay stubs, that's another red flag pointing to potential financial issues at the company. You can check if they're remitting your taxes by creating an account on the IRS website and viewing your wage and income transcript. It won't show real-time data, but you'll eventually be able to see if they're reporting your withholding properly. This is definitely a situation to stay on top of because if they're having financial troubles, tax withholding is often one of the first things struggling businesses stop remitting properly.

The IRS withholding calculator is definitely helpful but I found it confusing at first. Did you end up withholding enough to cover what you would owe? I tried using it but wasn't sure if I did it right.

Does that mean I'm in trouble if I sometimes move some of my inventory boxes around when I need to vacuum or clean? The space is definitely dedicated to my business but occasionally I need to shift things for maintenance.

No, you're not in trouble for basic maintenance activities like cleaning. That's considered a normal part of maintaining your business space. What the IRS looks for is whether the space serves a dual purpose. For example, if you're storing inventory in your bedroom where you also sleep, or using your living room couch for both business and personal activities, those spaces wouldn't qualify. But if you have boxes of inventory in a dedicated area and just move them temporarily to clean, that's perfectly fine.

I used TurboTax last year and it walks you through both methods and shows you which one gives you the bigger deduction. It asks for your total home square footage, the business-use square footage, and your expenses. Pretty straightforward. But honestly, I still got confused with some of the questions about "exclusive use" and partial room usage. Had to google a bunch of stuff that wasn't clear in the software.

That's a really good point! Should I also get a copy of his tax return showing he included the income? Or is that too much to ask?

Getting a copy of his tax return would be ideal, but many people aren't comfortable sharing their full tax returns. At minimum, I'd ask for a signed statement that acknowledges the specific dollar amount from the 1099-K and confirms he included it on his Schedule C or business return. If he's willing to provide a redacted copy of his Schedule C showing the income line that includes these sales, that would be even better. The more documentation you have showing this was handled properly and wasn't an attempt to evade taxes, the better positioned you'll be if there are ever questions.

Did the IRS ever contact you about the mismatch between the 1099-K with your SSN and your tax return before you filed the nominee forms?

That's a really good point! My sister definitely treats it like a business - she has separate bank accounts, business cards, advertising, and she's been working on adjusting her pricing to be more profitable. She's only been doing it for about 18 months, so this is her first year with a full 12 months of operation. Does that help her case for it being a legitimate business vs a hobby?

Yes, that definitely helps her case! Separate business accounts, marketing materials, and actively working on pricing strategies all demonstrate business-like behavior. The fact that it's only been running for 18 months is also helpful - the IRS generally expects businesses might have losses in their early years. For additional protection, I'd suggest she document her efforts to make the business profitable - like market research, business plan updates, or courses she's taken to improve her skills or efficiency. The IRS uses a nine-factor test for determining hobby vs. business, and documentation showing profit motive is crucial. With her full-time job providing income, she's not dependent on the grooming business for livelihood, which could be one mark against her, but the other factors you mentioned strongly support treating it as a legitimate business.

I used it last year for my photography side gig that showed a small loss. It was pretty straightforward for getting the Schedule C done correctly, and it asked all the right questions to make sure I got all possible deductions. I think it was worth it for the peace of mind.