At first glance, it seems as if Jesus is saying he should leave his father's dead body and not bother to have the funeral.
However, all the Bible scholars I've read talking about this passage say that this is not a case of the father has died and his body is waiting to be buried.
This is a case of the guy giving excuses that he wants to wait until his father has died before he comes to follow Jesus.
We hear similar excuses today. "I'll serve God when I retire." "I'll get baptized after my parents have passed away." etc.
The time to follow Jesus is now.