Since you plan to file HOH for 2023, you could file your W-4 as HOH, but then you would need to give your employer an updated W-4 as single to start January 2024. If you just give a w-4 as single, you won't have to update it. You may have a bit of excess income tax withheld for the remainder of 2023 but that will come back to you as a refund. Remember that the W-4 doesn't change the tax you eventually owe, it just changes how much you pay in advance.
