He didn't exist so he couldn't have written anything. If he had existed and was raised in Nazareth he would have been in a village so small that it didn't even have a place to pray and in a region so backwards that the literacy rate was around 1%. There are no works that people claim that he wrote. Even that was a bridge too far for them. Walking on water was more believable than being literate in that region.

The argument usually is that the authors, compilers, and translators were guided by the hand of God. Not specifically that Jesus was sitting down with an inkwell.

Closest thing is written accounts by the men who traveled with him about Jesus's actions and statements.