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Dear Aleisha,
Thanks for your updates and sorry for my mistake.
When I copy the formula, I mistakenly add a comma after || of the GSL part.
You may try the formula as follows to see the result.
=if(([$_x0024_TotalNumberofPICs]=='2'||[$_x0024_TotalNumberofPICs]=='3'||[$_x0024_TotalNumberofPICs]=='4'||[$_x0024_TotalNumberofPICs]=='5'||[$_x0024_TotalNumberofPICs]=='6'||[$_x0024_TotalNumberofPICs]=='7'||[$_x0024_TotalNumberofPICs]=='8'||[$_x0024_TotalNumberofPICs]=='9')&&([$_x0024_TypeOfTSL]=='GSL'||[$_x0024_TypeOfTSL]=='VRSL'||[$_x0024_TypeOfTSL]=='LPSL'||[$_x0024_TypeOfTSL]=='SPSL and LPSL'),'true','false')
Thanks for your effort and time!
Sincerely,
Cliff | Microsoft Community Moderator