Tax invoice starting 2019

Hi,

Was requested by main con to issue Tax Invoice for work done during GST Era.

Any one know what to do? Open the period of August 2018 (TAP)?

I tried to call Kastam several times,but no one answer the calls.

We are going to issue tax invoice for retention sum (Applied for EOT from Kastam), anyone know how to do?filing online?

Asked on March 19, 2019 2019-03-19 07:08:53 Business (商家)
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