We are trying to post Bills from QuickBooks-V3-DotNET-SDK but we get an error. Were sorry, QuickBooks encountered an error while calculating tax.

Thanks so much for your question. 

Are you able to give me a bit more context as to what you are trying to do so I can understand? 

Which payment method are you using for your bill? 

Some notes for GST and bills:

• If GST is not applicable/set up in QuickBooks then GST codes and GST amounts are not required
• If GST is applicable then GST coding will be required
• QuickBooks will calculate GST based on the GST code IF no GST amount is specified
• When a GST amount is specified, the amount will override any calculation that would normally be made by QuickBooks. This allows for any rounding differences between QuickBooks and other 3rd party applications.