It depends on your income and goals. As a single person with no dependents, you will have a higher tax liability and fewer if any credits to lower your tax liability.
If you do not have enough taken out, then you will also be subject to a penalty on the underpayment.
However, your maximum IRA contribution is $8,000. The difference between the standard deduction and head of household for 2025 is $7,500. So in reality, this could be the difference in the offset, between your contribution and your lower deduction. This would be a form of tax planning if you choose to do so.
There is no rule that says you MUST change your W4 to single.
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