I recently installed a new circuit board in my Goodman gas furnace, I have it all wired except for the neutrals because, on the original circuit board the neutrals were lettered and numbered to identify which connection went where, but on the new circuit board, there are no numbers or letters, and I do not know what neutral goes where help

All of the neutrals are tied together on the back side of the board. It makes no difference which neutral goes where as long as they all are on a terminal in the row of neutral terminals.