Yes, you can carry goods for other people, but you will not be entitled to any duty-free relief. In other words, you will need to declare these goods to us irrespective of value, and then submit a IT4 declaration (if the goods are valued up to USD $1,000), or a IM4 declaration (if the goods are valued in excess of USD $1,000).
[vcex_button url="https://customs.gov.tl/travelers/duty-free-allowances/" layout="block" style="plain-text" classes="button-with-top-border right-side" font_weight="500" icon_right="ticon ticon-angle-right" target="blank"]You can find out more information about duty free allowances here[/vcex_button]