I use renova does that affect juvederm's longevity?

Juvederm would normally be injected to a level deeper than Renova would reach when placed on the skin.  Using Renova should not affect the longevity of Juvederm.  

Renova, or any retinoid, affects the epidermis and dermis to improve skin texture and tone. Fillers, on the other hand, are injected beneath the dermis to correct volume loss. Since they work at different levels of the skin, there is no problem with combining the two. In fact, they complement each other nicely.

No, using Renova should not have any affect the Juvederm that's injected within the tissues.