Yes, You can alter the GST amount on Bills.

After selecting the account, amount and adding GST, a box with the GST is shown between the Subtotal and total.

You are able to simply go to that box and change the GST amount to match your Bill.

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Resolution for 'Autocalculates issue: 'Is it possible to alter the GST amount when entering a bill? Autocalculates a few cents differently to some invoices' available: Yes.

The Autocalculates issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the Autocalculates issue yourself by looking for a resolution described in the article. If it is a complex Autocalculates issue or you are unable to solve the issue, you may contact us by clicking here or by using other Autocalculates support options.

For more information about resolving issues related to Autocalculates in Quickbooks/QBO or to get support for the issue 'Is it possible to alter the GST amount when entering a bill? Autocalculates a few cents differently to some invoices', click the link below: