Deductions & credits

ThomasM125 or any expert:  OK, exactly what info do I need to fill in on the 2441.  I can see the FSA amount on the form, but what else do I have to enter to show that I paid child care providers, which expenses were reimbursed?

And does it matter if the expenses were incurred in 2020, but I was reimbursed in 2021?