It goes by your date of birth---and uses your age at the end of 2022. If you had a 2023 birthday and blew out 65 candles in January, that does not count.
Can you please tell me how to calculate the standard deduction then? In 2022 I was 54years old.
$25,900 is the correct standard deduction for tax year 2022 when filing married filing jointly and under the age of 65.
Ok, I have to admit, Turbo Tax was right.
I have done the Standard deduction calculation though the official IRS tool:
https://www.irs.gov/help/ita/how-much-is-my-standard-deduction
And the result is the same given by TurboTax.