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Question

Issue: Abnormal GST Calculation on AR Retainage Invoice (Partial Holdback)

  • January 5, 2026
  • 0 replies
  • 10 views

Hello Team,

I’m seeking advise  on the correct approach to reverse or correct an AR retainage invoice that generated an unexpected/abnormal GST amount in the tax total.

We are a construction company processing a partial holdback (retainage) for a project. The retainage invoice was created by releasing AR retainage and selecting only the applicable lines. However, upon release, the system calculated a GST amount that does not align with the retainage value or expected tax calculation.

I would appreciate assistance with the following:

  • Possible reasons Acumatica may calculate GST incorrectly on a partial retainage release

  • The recommended method to reverse or adjust the invoice while ensuring GST is corrected properly

Any insight or best-practice guidance would be appreciated.

Thank you.