It's possible that what you're seeing is an exemption limitation based on income.
For example, if you're married filing joint and your federal adjusted gross income was over $150,000 but not over $175,000, each of your exemption amounts would drop to $1,600, equaling the total exemption amount you're seeing.
And, in that scenario, your spouse would still be getting the $1,000 age exemption, since that wouldn't be affected by the reduction.
Please see Exemption Amount Chart (10A) and 10 Exemptions in the Maryland State and Local Tax Forms and Instructions, available on Maryland's 2022 Individual Income Tax Forms page.
If this isn't the case, please post back.
