Credit not applying on QBO sync

We recently applied a credit of £1,000 to a client after we sold some of their equipment for them (we just discounted the amount from the invoice we sent them), but the credited amount was not sent over to QBO so they still received an invoice for the full amount.

Also, the credit applied on Syncro’s side was applied after VAT had been added - surely it should apply before VAT has been added?

Credits do not sync over. https://help.syncromsp.com/hc/en-us/articles/115002534774-Setting-up-your-QuickBooks-Integration-Start-Here-

Credits now sync over from Syncro to Quickbooks, if the option is selected in sync settings. However, it is hit or miss whether the credit payment syncs to QBO when it is applied to an invoice in Syncro. Support is currently investigating .