You can look up tax credits on the IRS website or on your state tax agency’s website. Here are some steps you can follow:

1. IRS website: Go to the IRS website (www.irs.gov) and navigate to the “Credits & Deductions” section. This section provides information on various tax credits available to taxpayers, including eligibility requirements, limitations, and how to claim the credit on your tax return.
2. State tax agency website: If you’re looking for information on state-specific tax credits, you can visit your state tax agency’s website. Most state tax agencies provide information on tax credits available to residents, including eligibility requirements and how to claim the credit on your state tax return.
3. Consult with a tax professional: If you’re unsure which tax credits you may be eligible for or how to claim them, it’s recommended to consult with a tax professional. A tax professional can help you navigate the complex tax code and ensure that you’re taking advantage of all available tax credits and incentives.

It’s important to note that tax credits are subject to change each year, and it’s recommended to check for any updates or changes before claiming a tax credit on your tax return.