Hi @KLove82,
I hope you are well today and thanks for posting on the forums.
Which MarketPress plugin version are you using?
I think you are using pro version of MarketPress plugin and not this free version as FedEx shipping option is only available for pro version of MarketPress plugin.
If you are using pro version of MarketPress plugin then could you please ask your question on our WPMU DEV support forum by using the following form as WordPress.org discourages support of commercial products here (see: Commercial products are not supported here)?
https://premium.wpmudev.org/forums/#question
Please advise.
Kind Regards,
WPMU DEV