Hi, during the final tax assessment, the tax authority reconciles the total tax due with the amount of tax already withheld. If the withholding tax exceeds the final tax liability, the taxpayer may be entitled to a refund. Conversely, if the withholding tax is less than the final tax liability, the taxpayer will need to pay the difference.
Provisional tax amount: (canton + municipality) + (federal taxes)
Provisional taxes already paid by you: withholding tax
The provisional tax to be paid is the difference between or even you may be able to get a refund.