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Australian BAS – Change from Quarterly to Monthly from July 2026

  • August 18, 2026
  • 1 reply
  • 43 views
janinakeith
Freshman I

Hi everyone,

Looking for advice on changing an Australian BAS setup from Quarterly to Monthly from 1 July 2026 in MYOB Acumatica 2025.1 (Build 2025.101.503.568).

Current Tax Periods:

  • 01-2026: Jan–Mar — Closed
  • 02-2026: Apr–Jun — Closed
  • 03-2026: Jul–Sep — Open
  • 04-2026: Oct–Dec — Open

Business needs Apr–Jun 2026 to remain quarterly, then Tax Year 2027 to start 1 July 2026 with monthly periods through 30 June 2027.

The GL Financial Year 2027 is already correctly configured as 1 July 2026–30 June 2027 with 12 monthly periods.

Can we safely shorten the 2026 Tax Year by deleting only the open 03-2026 and 04-2026 periods, then create Tax Year 2027 as Monthly, without affecting the closed Apr–Jun 2026 period?

What is the supported approach for this scenario?

Best answer by saravanaacumaticaconsultant

This is an AI generted Answer

Yes , since Apr–Jun 2026 is already closed, it should remain unchanged.

The supported approach is to mark Tax Year 2026 as a Short Tax Year and delete only the open periods (Jul–Sep and Oct–Dec 2026). Then create Tax Year 2027 with Monthly periods starting 1 July 2026.

Please test this in a copy of the company and confirm with MYOB Acumatica Support before making the change.

Closed tax periods cannot be modified.

1 reply

S
Freshman II

This is an AI generted Answer

Yes , since Apr–Jun 2026 is already closed, it should remain unchanged.

The supported approach is to mark Tax Year 2026 as a Short Tax Year and delete only the open periods (Jul–Sep and Oct–Dec 2026). Then create Tax Year 2027 with Monthly periods starting 1 July 2026.

Please test this in a copy of the company and confirm with MYOB Acumatica Support before making the change.

Closed tax periods cannot be modified.

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