Advanced Filter Active Sheet Macro Code

the macro mentioned below has been assigned to a combo-box form. I have 2 different datasets in the same sheet, they have the same headers (but named differently, myhead and myhead1) and the same adv filter criteria range (named as "dcrit") is applicable to both datasets. So, if an item is selected from the combo-box, both the datasets should get filtered according to same criteria. how i can combine the 2 IF LOOPS mentioned in the code?

Sub myfilt()
Application. ScreenUpdating = False
If ActiveSheet.FilterMode Then ActiveSheet.ShowAllData
If Not (Range("indsignal")) Or Not (Range("countsignal")) Then
Range(Range("myhead"), Range("myhead").Offset(1, 0).End(xlDown)).AdvancedFilter _
Action:=xlFilterInPlace, CriteriaRange:=Range("dcrit"), Unique:=False
End If
If Not (Range("indsignal")) Or Not (Range("countsignal")) Then
Range(Range("myhead1"), Range("myhead1").Offset(1, 0).End(xlDown)).AdvancedFilter _
Action:=xlFilterInPlace, CriteriaRange:=Range("dcrit"), Unique:=False
End If
Application.CutCopyMode = False
Application.ScreenUpdating = True

End Sub