Is my Dependent Care FSA Administrator allowed to deny my claims because the date of service (in the 2019 taxable year) is before the date the FSA was opened?

[Vanessa A]

This is not really a tax question as much as it is an employment law question.  Please contact your HR department or your state insurance department. 

[Critter]

Can I use my FSA to reimburse outstanding medical expenses from the prior year?

No, expenses must be incurred during the current plan year.