Quarterly Simpler BAS prep checklist (free)
A single offline HTML page for GST-registered Australian sole traders on Simpler BAS.
It shows the next standard quarterly due date and a nine-step prep checklist (gather invoices, split GST-free lines, total G1 / 1A / 1B, check net GST, enter figures in the ATO Business portal, keep records). Ticks save in this browser only.
Double-click baschecklist.html. Works from file://. No account. Does not lodge.
Not tax advice. Not an ATO product. Confirm dates and labels on ato.gov.au.
If you want a running ledger under those labels, TinyBAS is a one-time A$19 download: https://payhip.com/b/Bsukb