Open your window button on ur computer.
example picture :
then u will see a search bar that says "Search programs and Files"
in that you wanna type %appdata%
then hit enter
After that you will see a roaming file
Open it
you will see minecraft folder
Open it
Find your screenshot folder
Open it
then locate your screenshot
once you located your screenshot you will be to upload it using sites like img. or photobucket
once you do this you will need to copy the IMG code
copy and paste that code to the forums and your done
