Applications · Free for bookkeepers
Can you claim the GST on this invoice?
Pick an invoice and press the button. In seconds you’ll know if it’s a valid tax invoice, if the supplier could charge GST, if the GST adds up, and if the purchase needs a second look.
Every business and figure in the samples is made up.
The invoice
IRONBARK PLUMBING PTY LTD ABN 90 551 661 605 14 Tallow Lane, Geelong VIC 3220 TAX INVOICE Invoice no: INV-2291 Date: 3/10/2026 Bill to: Wattle Street Dental Pty Ltd ABN 62 471 903 625 2/88 Wattle Street, Geelong VIC 3220 Description Amount Replace tempering valve on hot water unit $340.00 Labour, 2 hours at $95.00 $190.00 Call-out fee $85.00 Subtotal (ex GST) $615.00 GST $61.50 Total (inc GST) $676.50 Payment within 14 days. BSB 063-000 Acc 1234 5678
The check
- Read the invoice
- Check it is a valid tax invoice
- Check the ABN and GST registration
- Check the GST adds up
- Look at what it was for
- Press the button to run the checks.
The model reads it
It pulls out the supplier, ABN, dates and figures, and says what each line is: a repair, a meal, a laptop, a year of software.
Plain code checks it
The tax invoice rules, the ABN register and the GST sums are code, not the model. Every finding says what it was based on.
Nothing is kept
The invoice and the answer are discarded once you see them. Tax file numbers are removed before the model reads anything.