Select the Bulk Release Retainage (retention) button, which is located just above the SOV table on your project overview tab:

This feature allows general contractors to release retainage on multiple SOVs in just a few clicks. Doing so will create the retainage AFP(s) on behalf of the subcontractor and trigger any associated lien waivers in the process. This eliminates the need for subcontractors to comeback into GCPay to bill for retainage, and provides general contractors greater control over the timing of retainage release.
Many users will find the feature most appropriate when a contract has been billed to completion. However you'll be able to release any retention held on a contract as long as there is at least one approved pay application.

Upon selecting the contracts for which you'll be releasing retainage, GCPay will prompt you to decide whether or not you'd like to generate waivers with your retention AFP or suppress them.
If you select Enable Waivers, the default waivers you have specified for the project will be sent to the relevant subcontractor, including any final waivers.

Once you complete the above step, your retention pay applications will be available for export on the Integration Tab if you use GCPay in conjunction with a supported ERP platform if you indeed wish to export them.