Tax Due Date 2024 Massachusetts Institute. The irs starts accepting 2023 returns. The extension deadline is october 15, 2024 to file your massachusetts income.

The extension deadline is october 15, 2024 to file your massachusetts income. Pursuant to the fiscal year 2023 (fy23) budget, for tax years beginning on or after january 1, 2022, massachusetts generally conforms to the internal revenue code.