BOSTON (AP) — Gov. Charlie Baker is preparing to release his state budget proposal for the new fiscal year a day after delivering his annual State of the Commonwealth address.

The spending plan to be unveiled Wednesday marks the start of budget negotiations at the Massachusetts Statehouse for the 2021 fiscal year that begins July 1.

Among the proposals included in the Baker's budget are several initiatives aimed at supporting people with disabilities. 2020 marks the 30th anniversary of the signing of the Americans with Disabilities Act.

Those proposals include a new disability employment tax credit for Massachusetts employers who hire and retain persons with disabilities.

To be eligible, businesses would have to hire an Massachusetts resident with a disability and continue to employ the person for at least 18 consecutive months. In return, the employer would become eligible for a tax credit of 30% of wages paid in that taxable year up to $2000.

Eligible workers must be able to work independently, meet the definition of disability under the Americans with Disabilities Act, and be certified by the Massachusetts Rehabilitation Commission as having a physical or mental impairment that constitutes or results in a substantial impediment to employment.

Baker's budget will also include funding for the Massachusetts Commission for the Deaf and Hard of Hearing to support educational institutions that offer American Sign Language to help increase the state's interpreter workforce.

The unveiling of the budget comes a day after Baker delivered his annual State of the Commonwealth address.

In the address, Baker said he wants to dramatically reduce the state's reliance on polluting fuels while expanding housing opportunities and upgrading the state's public transportation system.

Baker said he is committing the state to achieve a climate goal of net-zero greenhouse gas emissions by 2050 — a goal that has the backing of Democratic leaders in the Massachusetts House and Senate.

Key to reaching that goal, Baker said, is the adoption of a multi-state proposal called the Transportation and Climate Initiative that aims to reduce carbon emissions from cars, trucks and other means of transportation.

Another challenge is public transportation, particularly the Massachusetts Bay Transportation Authority — the network of subways, buses and commuter rails that serve the metropolitan Boston area, which has been plagued in recent years by derailments and delays.

Baker said his 2021 budget proposal will include an increase of $135 million in operating funds for the MBTA.

The governor's spending plan marks the start of the budget debate on Beacon Hill.

The House and Senate will release and debate their own versions of the budget before hashing out a single compromise version that must be approved by both chambers before being sent to Baker for his signature by the start of 2021 fiscal year on July 1.