I do have another way which is working for me (below). I just wanted to try this other way to see if works more efficient.

IF (

(@Client = 'Winco Foods'

AND EXISTS

( SELECT 1

FROM ClaimSummary_Winco CSW

WHERE CSW.AuditNbr is null

OR CSW.VndNbr is null

OR CSW.VndName is null

OR CSW.CompanyCode is null

OR CSW.AuditorID is null

OR CSW.ClmAmt is null

OR CSW.PRGCode is null

OR CSW.[Year] is null

OR CSW.ClmNbr is null

OR CSW.CompanyCode is null

)

)