If you’re handling a loved one’s estate in Massachusetts, you might need to file probate court forms related to inheritance tax. While Massachusetts doesn’t have a traditional inheritance tax like some states, it does have an estate tax that affects larger estates and the paperwork involved can feel overwhelming if you don’t know where to start.

What exactly are Massachusetts probate court forms for inheritance tax?

Technically, Massachusetts doesn’t impose an “inheritance tax” on beneficiaries. Instead, it has an estate tax that applies when the total value of the deceased person’s assets exceeds $2 million (as of 2024). The forms you’ll use during probate help the court and the Department of Revenue determine whether estate taxes are due and how much.

These include affidavits, inventory lists, tax return forms like M-706, and petitions to close or administer the estate. Even if no tax is owed, filing correctly matters skipping steps can delay distributions or trigger penalties.

When do I actually need to deal with these forms?

You’ll likely encounter them if you’re named executor or personal representative of an estate valued over the $2 million threshold. But even below that, you may still need to file certain documents to formally close the estate or prove no tax is due.

For example, if the estate includes real estate, bank accounts over a certain size, or investment holdings, the probate court will expect documentation showing how assets were valued and distributed. You can learn more about which specific forms are required based on your situation.

Common mistakes people make (and how to avoid them)

  • Missing deadlines: The estate tax return (Form M-706) is generally due nine months after death. Extensions are possible, but interest accrues on unpaid taxes.
  • Underestimating asset values: Real estate, business interests, and even personal property must be appraised at fair market value. Lowballing invites audits.
  • Filing incomplete inventories: Leaving out assets even small ones can cause delays or require amended filings later.
  • Not coordinating with the probate court and DOR: Some forms go to the court, others to the Department of Revenue. Mixing them up slows everything down.

Where to find the right forms and instructions

The Massachusetts Probate and Family Court website offers most standard forms for free. For tax-specific paperwork like Form M-706, check the Department of Revenue’s estate tax page. Many people also find it helpful to review step-by-step guidance on filling out each section, especially if they’re doing this without a lawyer.

Do I need a lawyer for this?

Not always. If the estate is straightforward and under the taxable threshold, many executors handle it themselves using court resources. But if the estate is complex multiple properties, business ownership, disputes among heirs, or debts exceeding assets legal help can save time and prevent costly errors.

You can also get clarity by reading through what each document actually requires before deciding whether to hire someone.

What happens after I file?

Once forms are submitted, the court reviews them for completeness. If estate tax is due, payment must be made before assets can be distributed. The court may also require a final accounting showing how money and property were divided among heirs.

If everything checks out, the judge issues an order closing the estate. This protects you as executor from future claims related to mismanagement or unpaid taxes.

Next steps you can take today

  • Download the checklist of common forms used in Massachusetts probate cases involving estate taxes.
  • Make a list of all assets and their estimated values including vehicles, real estate, investments, and personal items worth over $500.
  • Mark your calendar with key deadlines: nine months from date of death for tax returns, and any local probate court hearing dates.
  • If you’re unsure which box to check or what number to enter, don’t guess call the court clerk or consult the instructions included with each form.