Yes, because this just hides the column, not modifies the data. If you want the variance and total value to change accordingly, you can modify your variance and total value expressions.
For example, when calculating the total value, use the following expression:
=IIF(Parameters!IncludePTO.Value="Yes",Fields!Payroll.Value+Fields!OT.Value+Fields!PTO.Value,Fields!Payroll.Value+Fields!OT.Value)
This expression means that when the value of IncludePTO is "Yes", calculate the added value of Payroll, OT, and PT, otherwise calculate the added value of Payroll and OT.
Preview:
Best regards,
Aniya