Texas, of course, has no income tax.
But since you're a resident of MA, all your income is taxable by MA - including your earnings from any remote work.
Since your TX employer will not be withholding MA taxes, you will want to begin making estimated tax payments to MA for that portion of your income. Here's a link to MA's information page regarding estimated tax payments:
https://www.mass.gov/info-details/dor-estimated-tax-payments
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
