That's a really smart point I hadn't considered. We're doing great, but I guess it makes sense to document everything properly regardless. Better to have clear boundaries even when things are good. Did you just write up something informal or did you use a specific format for your agreement?

We didn't have anything formal which is why it became a problem. What I recommend now (after learning the hard way) is a simple document that states: 1) Both parties' names and the property address, 2) The tax year it applies to, 3) The specific percentage split of mortgage interest and property tax deductions, 4) A statement that both parties understand this arrangement and won't claim more than their agreed portion, and 5) Both signatures and the date. It doesn't need to be notarized or anything fancy - just having something in writing helps prevent misunderstandings. You could even email it to each other so there's a digital timestamp. Some couples renew this agreement each tax year if their financial contributions change.

Smart move with the separate account. I was wondering though - does it matter who actually transfers the money to the mortgage company? Like if the payment comes from a joint account but one person set up the automatic payment, does the IRS care about that detail?

Thanks for the reminder about Schedule SE! I actually did factor that in when I increased my withholding. I calculated roughly what I'd owe for both income tax and self-employment tax on the $18,500 and that's how I came up with the $320 per paycheck increase. Do you know if there's an easy way to check if I'm on track to meet the safe harbor requirement? I'm still a bit nervous about whether I've withheld enough.

You can use the IRS Withholding Estimator on their website. It will let you input both your W2 income/withholding and your 1099 income, then tell you if you're on track. Another simple approach is to look at your last paystub from 2024 and add up the federal withholding. Then add what you expect to have withheld for the rest of 2025 based on your current withholding rate. If that total is at least $16,300 (your tax from last year), you'll meet the safe harbor requirement.

But aren't you basically losing money by giving the government an interest-free loan? You could be investing that money throughout the year instead. I set calendar reminders for estimated payments and it's not that bad.

This is super helpful advice. You can get the wage and income transcript online through the IRS website if you set up an account. I had to do this when I lost my 1099s from 2020 while moving.

I tried the Taxpayer Advocate last year and they told me they couldn't help with identity verification cases unless there was a genuine financial hardship. Has this policy changed recently?

The policy hasn't officially changed, but in practice, it varies by office and how you present your case. Identity verification cases can qualify if you can demonstrate actual financial hardship (like facing eviction, utility shutoff, inability to pay for medications, etc.) caused by not receiving your refund. What's also changed is that some Taxpayer Advocate offices now have specialized staff just for handling identity verification backlogs. Worth calling your local office to check their current procedures, as they've been updating their approach to handle the massive backlog of these cases.

I did this last month and it worked perfectly! Called the appointment line (844-545-5640), got an appointment for the following week at my local office. Brought my ID, social security card, the IRS letter, and copies of my tax returns. The agent verified my identity on the spot and released my return for processing. Refund showed up 3 weeks later!

That's a great idea about asking for a sample pay stub! I didn't even think of that. Are HSA contributions similar to 401k in how they affect taxes? And do you know if parking deductions are pre-tax or post-tax?

HSA contributions are even better than 401k contributions tax-wise. They're pre-tax when made through payroll deduction, they grow tax-free, AND withdrawals are tax-free when used for qualified medical expenses. It's the only triple tax advantage account available. Definitely max it out if you have a High Deductible Health Plan. Parking and transit benefits are typically pre-tax up to the IRS limit (around $280/month for 2025), but it depends on whether your employer has set up a qualified transportation benefit program. Some smaller employers might just provide a taxable parking stipend instead. Definitely worth asking HR about the specifics of their program.

This is good advice but your math is a bit off. 65000/26 is actually $2,500 (not $2,400). Also, federal tax will probably be lower than 15% effective rate on $65k, especially with 401k contributions reducing taxable income.