Creating table containing future data based on rules

ve this a try : 

Expected Invoice =
var start_date = MIN(Contracts[Starting Date])
var invoice_period = MAX(Contracts[Invoice Period])
var invoice_value = MAX(Contracts[Contract Value])
return
ADDCOLUMNS(
FILTER(
CALENDAR(start_date, DATEADD(MAX(Calendar[Date]), X, MONTH)),
MOD(DATEDIFF([Date], start_date, MONTH), invoice_period) = 0
),
"Contract ID", MAX(Contracts[Contract ID]),
"Invoice Value", invoice_value
)


Replace "X" in the formula with the number of months you want to display the invoices for.