Polls close times vary by state and locality, so to answer precisely for today you’d need your polling location. Common guidance:

• Most states close polls between 7:00 p.m. and 8:00 p.m. local time, but a few close earlier or later or have 6:00 a.m.–7:00 p.m. windows depending on where you vote. If you’re in line when polls close, you’re still allowed to vote in many places.
• To confirm today’s exact closing time for your location, check the official state or local election website or your county election office, or use your state’s equivalent voter information portal.
• You can also look up your polling place and hours by entering your address on official election websites or by contacting your local election office.

If you share your state and city or ZIP code, I can give a precise closing time and where to verify it.