All AgentFirst listings will be pushing directly to the MLS from the listing form. . Start creating your listing on SFAR AgentFirst by following this simple form:
Towards the bottom of the form, you will notice a box that will ask you if for the county and APN #. Realist can be used to look up the APN # if needed. 
Please note once you have pushed the listing to SFARMLS you cannot re-push the listing at any point in time.