这句英文说的对吗？不对的话请纠正

I need the informations as follows to proceed in his official invitation letter~~

PS：最后是不是邀请函？

invation 应为 invitation

其它好像没啥问题。

楼上将information 用成复数，不对吧？

I need the following info to prepare his official invitation letter.这样写应该好点。