How do I record early payment?

How do I record early payment?

I have customers who pay rent early by putting several months payment in one check.  What is the proper way to record this advance payment in Zoho Invoice?  I have seen a YouTube video of how to do it from several years ago ( http://www.youtube.com/watch?feature=player_embedded&v=ywkKMul7NSs) but it appears to be from an older version.  Can someone tell me how to do it on the new version of Zoho Invoice?  Thanks!