This is not a dependent deduction. A dependent deduction does not exist. It your standard deduction. The normal standard deduction for Married Filing Joint is $24,000. If you are both over age 65, that is bumped up an additional $1,300 for each of you for a total standard deduction of $26,600.
*2019 amounts:
Single: 12,200
MFJ 24,400
MFS 12,200
HOH 18,350