QB Issue Resolution:

You use two lines for the vat one is the full amount net plus the vat which you have been charged using the Uk vat code S. then the second line is a negative value for the nett with no vat setting.

This leave the vat charged under S code as the value posted to vat account memo the line with the C79 number.

Resolution for Issue 'I have a client that imports good from the US & China. I have received a C79 form From HMRC showing import VAT. How do I account for this in QB online?' available: Yes (Solved).
Source: Intuit Community forum.

I have a client that imports good from the US & China. I have received a C79 form From HMRC showing import VAT. How do I account for this in QB online?: this 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 issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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