16,550 is right for 2024. The 18,500 is for next year when you do your 2025 tax return.
For 2024 the standard deduction amounts are:
Single 14,600 + 1,950 for 65 and over or blind (16,550)
HOH 21,900 + 1,950 for 65 and over or blind (23,850)
Joint 29,200 + 1,550 for each 65 and over or blind (30,750/32,300)
Married filing Separate 14,600 + 1,550 for 65 and over or blind (16,150)
Your standard deduction lowers your taxable income. The standard deduction makes some of your income “tax free.” It is not a refund. You will see your standard or itemized deduction amount on line 12 of your 2024 Form 1040.
2024 STANDARD DEDUCTION AMOUNTS
SINGLE $14,600 (65 or older/legally blind + $1950)
MARRIED FILING SEPARATELY $14,600 (65 or older/legally blind + $1550)
MARRIED FILING JOINTLY $29,200 (65 or older/legally blind + $1550)
HEAD OF HOUSEHOLD $21,900 (65 or older/legally blind + $1950)