A lightroom question

I use Lightroom CC Classic and Photoshop CC.
I send images to various people and competitions. Before I send the
image I place it in a dedicated folder. Sometimes, while reviewing the
images, I see something that should be changed. If it is a JPEG image I
go back to the original, make the change, then make requisite size and
color space changes, and re-save. All of that takes a lot of time. Does
anyone know how to directly save the change using only LR? I don't want
to do this on JPEG files, but only on tiff.


--
PeterN