Solution obtain!



Code:
Total: IIf(Month(Date())<7,IIf(Sum(IIf(DatePart("m",[PaymentDate])>=5 And 7 Or DatePart("m",[PaymentDate])<=Month(Date()),1,0))=0,Null,Sum(IIf(DatePart("m",[PaymentDate])>=5 And 7 Or DatePart("m",[PaymentDate])<=Month(Date()),1,0))),IIf(Sum(IIf(DatePart("m",[PaymentDate])>=5 And 7 And DatePart("m",[PaymentDate])<=Month(Date()),1,0))=0,Null,Sum(IIf(DatePart("m",[PaymentDate])>=5 And 7 And DatePart("m",[PaymentDate])<=Month(Date()),1,0))))