TinyBAS + TinyInvoice together: offline Simpler BAS ledger (G1 / 1A / 1B) and Australian tax invoices that export TinyBAS-compatible CSV. One-time A$27 (save A$4 vs buying both).

What you get:

TinyBAS (A$19 alone) — running Simpler BAS ledger. Log sales and purchases, then copy G1, 1A, and 1B into the ATO portal yourself.

TinyInvoice (A$12 alone) — Australian tax invoice maker. Line items, Tax Invoice heading when GST applies, A4 print/PDF, TinyBAS-compatible CSV.

Bundle price A$27 AUD — save A$4 versus A$19 + A$12.

Double-click the HTML. Works from file://. No install, no account, no internet required. Data stays in your browser.

These are worksheets / templates only. Not tax advice, not ATO products, not lodgement tools. Not affiliated with the Australian Taxation Office. Check figures before you lodge or send. Instant download. No refunds on digital files once downloaded, except where a file will not open contact me and I will replace it.