GST 10% + low-value threshold + ABN validation on Magento, how do you wire it up?

Three Australian tax / business-identity rules to get right on a Sydney Magento store. (1) GST 10%, Australia's value-added tax, applied to most goods + services. Magento tax rules configured per AU storefront, with tax-inclusive prices on display (AU consumer law expects this) and tax-exclusive on B2B view if ABN is supplied. Tax-invoice templates aligned to ATO format (date, ABN, GST amount itemised). (2) Low-value imported-goods threshold (A$1,000), since July 2018, overseas sellers must collect GST on goods under A$1,000 imported into Australia. We configure separate Magento tax rules for AU-resident sellers vs offshore sellers, with the A$1,000 cutoff logic at cart-level (not per-line-item). Above A$1,000 the buyer pays GST + customs at import, we surface a customs-fee estimator at checkout. (3) ABN validation, for B2B purchases, we validate the buyer's ABN via the ABR (Australian Business Register) lookup API in real-time at checkout, gate trade pricing / Net-30 / GST-exclusive display behind a verified ABN. EOFY (Jun-Jul) reporting is wired into Xero / MYOB / Reckon One. OSR registration support for offshore sellers selling into AU.