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Hello,

I just want to figure it out what deduction I took was identified on 1040 form. 

Still take the picture I attached  as an example , that is for 2021.

on line 12aStandard deduction or itemized deductions (from Schedule A). , it is 25100.

It also list out standard deduction for married jointly is 25100 on the left side.

So is this standard deduction or itemized one?

If this is standard one, then the online answer confused me:" If there is any other digit, there would be a 100% chance it was an Itemized deduction".

Or this is for past years when standard deduction is zero. It is not applicable for 2021 and after years.

Thanks