Tax difference when changing award flights

[jupiter]

Hi guys,

Need some expertise in this.

I have a confirmed return award ticket from SIN-PER. Due to work schedule change, I need to change a flight date. If I were to change and there is a tax difference, will I have to top up (or refund)?

Cheers,
hupiter

[Sethor]

Taxes will be the same, it will not change unless you change destination port.