Hi margkout,
Record the customer payment against the invoice for your part. Create a Receive Money/Spend Money for the leftover and post it to the liability account (that’s the earlier owner’s share). In Bank Feeds, use Find and match and tick both transactions, so they add up to the one deposit. If you prefer doing it on the spot, hit Split on the feed: one line to the customer payment, the rest to the liability. If you still unable to see where to allocate it, lodge a ticket at My Account or jump on live chat via virtual assistant MOCA and we’ll take a closer look.
Cheers,
Shella