The Tax Checklist When You're Managing Your Parent's Money

If you're now the person paying your parent's bills, tax season just got more complicated. Not impossible — but you're filing for someone else's life, which means twice the paperwork and some genuinely weird judgment calls about what counts as deductible.

The truth is, most families wing this the first year. You find out in April that you should have been tracking something since January. So here's what to actually gather, what you can skip, and the one thing that trips everyone up. If you haven't yet done a broader financial assessment — income, assets, insurance — tax season is a natural time to get everything in one place.

Start with income — all of it

Your parent's W-2 or 1099 if they're still working (some are). Social Security statement — the SSA-1099 usually arrives by early February, but if it doesn't, you can download it from their online account. Any pension distributions (1099-R forms). Investment income, including interest, dividends, capital gains — anything from a brokerage or bank account.

If they sold their house or a car this year, you need documentation of the sale. If they're collecting rental income from a property they still own, get those records together now.

The easy trap: forgetting about that one savings account at the credit union they opened in 1987. Interest income still counts even if it's $12.

Medical expenses might actually matter now

Most years, medical deductions don't help much — the threshold is high. But if your parent had a major health event, moved to assisted living, or started paying for substantial home care, this is the year it might tip.

You're looking for anything you paid out of pocket that insurance didn't cover: Medicare premiums (including Part B, Part D, and any supplemental plan), prescriptions, doctor visits, medical equipment, dental and vision care, hearing aids.

If they moved to a care community, part of that monthly fee may be deductible — specifically the portion allocated to medical care. The facility should give you a statement breaking this down. If they don't offer one, ask. Some places make you ask.

Home modifications for medical reasons can count too: ramps, grab bars, a walk-in tub. You need a letter from a doctor saying it was medically necessary, not just nice to have.

Here's what's absurd: you can deduct mileage driven for medical appointments. The rate for 2026 is 21 cents per mile. Almost no one tracks this because it feels ridiculous to log every drive to the cardiologist. But if you're making those trips weekly, it adds up. A simple mileage log on your phone works fine.

Long-term care costs are a special category

If your parent is paying for long-term care — whether that's in-home help, adult day care, assisted living, memory care, or a nursing home — some or all of that cost may be deductible as a medical expense.

The rules here depend on the level of care. If they need help with at least two "activities of daily living" (eating, bathing, dressing, toileting, transferring, continence), the costs generally qualify. You may need a letter from their doctor confirming this.

If they have a long-term care insurance policy, keep track of what the policy paid and what you paid. The premiums may be deductible up to certain limits based on age.

The power of attorney question

If you're managing their finances under a power of attorney, you're not filing a separate return for them — you're filing their return, just signing it on their behalf. You'll sign your parent's name, then add your own signature and "by [Your Name], Attorney-in-Fact" or "under POA."

Some tax software handles this smoothly. Some doesn't. If you're e-filing, you may need to mail a copy of the POA with the return the first time.

If your parent has cognitive decline and never set up a POA, tax filing gets legally complicated fast. That's a separate conversation, probably involving an elder law attorney. The legal documents that need to be in place — POA, advance directive, HIPAA release — are worth getting to before you need them.

One thing to do right now

Set up a folder — physical or digital — labeled "2027 Taxes" and start dropping things in as they arrive. Future you will be very grateful.

You'll get through this. The first year is the hardest because you're learning their financial life as you go. By next year, you'll know where all the accounts are and which forms matter. That's worth something.