
Figure 1 - Create an Unearned Revenue Account in QuickBooks

Figure 2 - Retainer Service Item Mapped to Unearned Revenue

Figure 3 - Sales Receipt Recording the Retainer Payment

Figure 4 - Add a Retainer Invoice Item in Ruddr

Figure 5 - Map the Retainer Invoice Item to the QuickBooks Retainer Item
When your invoice is created, you need to add an ad-hoc line to the bottom of the invoice that uses the Retainer invoice item and offsets the entire amount of the invoice (assuming that you want to pay for the entire invoice from the retainer). This will result in a zero dollar invoice as shown below (Figure 6). Just click on the Publish button to push this invoice to QuickBooks.

Figure 6 - Invoice Offset by a Retainer Line

Figure 7 - Reduced Unearned Revenue Balance in QuickBooks