Taxpayers who are age 65 or older on the last day of the year and don't itemize deductions are entitled to a higher standard deduction.
Most filers who use Form 1040 can find their standard deduction on the first page of the form. The standard deduction for most filers of Form 1040-SR, U.S. Tax Return for Seniors, is on the last page of that form.
According to the Instructions for Form 1040 and 1040-SR, not all taxpayers can take a standard deduction, including:
A married individual filing as married filing separately whose spouse itemizes deductions - if one spouse itemizes on a separate return, both must itemize.
An individual who files a tax return for a period of less than 12 months. This is uncommon and could be due to a change in their annual accounting period.
An individual who was a nonresident alien or a dual-status alien during the year. Nonresident aliens who are married to a U.S. citizen or resident alien, however, can take the standard deduction in certain situations.