Your tax refund is not a benefit that you get from the government. It's your own money that the government is sending back to you. That's why it's called a refund. If you want to get a bigger refund, have your employer withhold more tax from your pay. The government will hold your money and send it back to you when you file your tax return at the end of the year. Your paycheck will be smaller, but you'll get a bigger refund when you file your tax return at the end of the year because you sent the government more money than necessary, so they send the excess back to you. You're just making an interest-free loan to the government.
You can use the Tax Withholding Estimator on the IRS web site to figure out how to adjust the W-4 form that you give to your employer. It will show you how to increase your withholding to get the approximate refund amount that you want.
