Question

Bob and Donna have been married for 35 years and have filed joint returns since their marriage. the couple has 3 children: Jack age 11, Bonnie age 16, and Margie age 22. All 3 children live with Bob and Donna. Margie is a full time student with no income. how many personal exemptions can Bob and Donna claim?

Answer 1

As per IRS 2018 No Personal Exemption is available.  

But items like Child Credits are still available.

Child Tax Credit-$2,000 per qualifying child

2000 * 3Qualifying Child = 6,000

Jack	Is a qualifying Child as under 19 and meet conditions**
Bonnie	Is a qualifying Child as under 19 and meet conditions
Margie	even above 19 But Below 24 and a Student with no income.

**To meet the qualifying child test the child must be younger than19 years old

or

A student younger than 24 years old as of the end of the calendar year(No income)