Activity Statement reference library¶

Quick, plain-English definitions of the Activity Statement terms and labels used across the Academy — from the BAS itself to each box on the form. Each entry gives a precise definition, the same idea in everyday words, and links to the lessons that explain it in full.

General information only — not tax, super or financial advice.

Terms A–Z¶

• 1A — GST on sales
• 1B — GST on purchases
• Business Activity Statement (BAS)
• BAS revision
• Deferred GST
• G1 — Total sales
• G10 — Capital purchases
• G11 — Non-capital purchases
• GST instalments
• GST turnover
• Instalment Activity Statement (IAS)
• Lodgment
• Lodgment list
• Simpler BAS
• Tax invoice
• Taxpayer declaration
• Validation
• W1 — Total salary, wages and other payments
• W2 — Amounts withheld from payments in W1
• W3 — Other amounts withheld
• W4 — Amounts withheld where no ABN is quoted