Mulitple IF statement with DATEVALUE & VLOOKUP

Could you please help I have the following formula that I need to add additional criteria to

=IFERROR(IF(VLOOKUP([@[Store '#]],ISS!$C:$HX,21,FALSE)="",DATEVALUE("01/01/3000"),VLOOKUP([@[Store '#]],ISS!$C:$HX,21,FALSE)),DATEVALUE("01/01/3000"))

I would like for statement to read If Field 23 is blank then use the date in field 21, if field 21 is blank then return 1/1/3000 else return date in field 23

I tried this function but got False  where I would like 1/1/3000 to populate: =IFERROR(IF(VLOOKUP([@[Store '#]],ISS!$C:$HX,23,FALSE)="",IF(VLOOKUP([@[Store '#]],ISS!$C:$HX,21,FALSE)="",DATEVALUE("01/01/3000")),VLOOKUP([@[Store '#]],ISS!$C:$HX,23,FALSE)),DATEVALUE("01/01/3000"))
jmac001Asked:
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tomfarrarCommented:
Can you attach a sample of the spreadsheet?
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ProfessorJimJamCommented:
=IFERROR(IF(VLOOKUP([@[Store '#]],ISS!$C:$HX,21,FALSE)="",DATEVALUE("01/01/3000"),if(VLOOKUP([@[Store '#]],ISS!$C:$HX,23,FALSE)="",VLOOKUP([@[Store '#]],ISS!$C:$HX,21,FALSE)))"")
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Rob HensonFinance AnalystCommented:
Prof JJ - missing comma before double quotes at end of formula.

How about, if not already covered, in logic syntax rather than formula:

IF ( AND (Lookup 21 = "", Lookup 23 = "") Then "01/01/3000" Else IF Lookup 23 = Blank Then Lookup 21 Else Lookup 23 )

All bound within an IFERROR (Formula, "")

Hope that makes sense and can be interpreted to formula.

Thanks
Rob H
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jmac001Author Commented:
Thanks Rob I was able to follow your solution. Prof JJ, Rob 's was the best solution, after trying the your solution it flipped the results that I had, populated dates changed to False and populated False to a date.
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