Having no dependents means you may not benefit from the tax reduction as much as others. I will also offer the following financial advice: Do NOT have the Fed take more out of your income than is needed to cover your tax obligation. For some unfathomable reason, a lot of taxpayers believe that giving the government an interest free loan is a good financial approach because, "Oh, wow, here it is in one big check."
Don't do that. If you get, say, $3,600 returned by the Fed as excessive tax withholding, then modify your deductions. Then deposit $300 per month into a tax-deferred retirement plan. That income is then not taxed at all (while your $3,600 "refund" is taxed) until you withdraw it at retirement. The retirement account earns a return through investments (and have been booming for the past year), while your "refund" is earning nothing.
If you are 35 years old, you are looking at another 30 years of work. The "I get a refund every year" approach will result in a retirement fund of 0 at retirement. If you set up the retirement account, at age 65, you will have saved about $32,000 on income taxes on the deferred income put into the retirement account, and will have a pool of money that you and your family own that totals $220,000.
Let me repeat ... if you put that $300 per month ($3,600 per year) into a tax-deferred retirement account for 30 years, you will have deposited $108,000 that will have turned into $220,000 with a mere 5% annual return, while also spending $32,000 less on income taxes. The net economic benefit to you is more than $250,000 - a quarter million dollars.
Oh, and that presumes you don't do better later in life, or deposit more than $300 per month into the retirement account, and the retirement account does not earn 9% some years, etc. If your retirement account returns 7% per year, rather than 5%, then the account will have about $300,000 when you turn 65. That money is yours, by the way, and you can give it to your kids or grandkids or a puppy shelter or whatever you want.
Call an investment counselor. Believe me ... you will not regret doing so.