Dear Liz: My mom is 93 and lives in Arizona. I’m in California. She refuses to complete a revocable living trust, and after several years, I have given up with the request. She states she has added my name to the deed to the house and her bank account. She believes she has done enough. She states she completed a will that she got at Office Max. What would be my first steps if she precedes me in death?

Answer: She may be stubborn, but she’s making mistakes that could impair her quality of life and saddle you with a big, unnecessary tax bill. Consider trying to persuade her to fix these errors before it’s too late.

Not having a living trust isn’t necessarily a crisis. Yes, a living trust would allow your mother’s estate to avoid probate, the court process that typically follows death. But probate in Arizona typically isn’t as long or expensive as it is in California.

What’s more important is having documents in place that allow you (or someone else) to handle her finances and make healthcare decisions should she become incapacitated. Without that, you might have to go to court, which could be a long and expensive process (especially now, with the backlog created by COVID-19-related shutdowns).

A living trust also would make it relatively easy for a trusted person to step in and handle her affairs if necessary. In the absence of a living trust, you should insist she fill out an advanced care directive that would allow a trusted person to make healthcare decisions for her. There are free versions for each state at PrepareForYourCare.org, along with instructions about how to make it valid. If she doesn’t have a computer, you can print out Arizona’s version and send it to her.

She also needs to create a power of attorney for finances. Offer to hire an estate planning attorney to do this, since it’s a relatively simple form and not likely to be expensive. There are online forms and software that can do this if she absolutely refuses to consult an attorney.

An estate planning attorney might also be able to help you get off the deed. When she added you to the deed, your mom signed you up to pay capital gains taxes you wouldn’t owe otherwise. All the appreciation in the home that happened during her lifetime would be taxable, when it doesn’t need to be.

Let’s say she bought the home for $25,000 and it was worth $250,000 when she died. If you inherited the home and sold it for $250,000, you would owe no capital gains taxes.

If she gives you the home before her death — which she essentially did by adding you to the deed — you don’t get the valuable step-up in tax basis that keeps you from having to pay capital gains taxes on the appreciation that happened during her lifetime. Instead, you would owe capital gains taxes on the $225,000 appreciation. (This is a simplified example meant to help you and her understand the magnitude of the blunder.)

Arizona is one of the many states that has “transfer on death” deeds for real estate. These deeds would allow the house to avoid probate and come directly to you. That’s almost certainly a better solution than the one she chose.