If the sales tax basis is set to "RTACCRUALS", ratable accruals, which is an option within Flowrev only, Flowrev will seamlessly defer and recognize sales tax for invoice (but not bills) line items from / into the sales tax account mapped into Flowrev with the same schedule as for the net invoice line item.

Contact support@flowrev.com to have your organization set to RTACCRUALS

For all other sales tax basis, Flowrev computes deferrals/recognition on the invoice line item amount net of the sales tax/VAT.

Also, see "When does Flowrev generate a recognition schedule for an invoice line item?"