to get uncompressed images edited within 2 days
you want to edit "Your Image.TIF" file.
Save JPEG copy of your original TIF file with the same resolution
and dimensions in pixels. We don't need a high quality copy for
the purpose; so do choose medium to low file size / quality in
"JPEG Options" dialog box (see example »).
Send this JPEG file (let it be "Your Image copy.JPG")
and your specific editing instructions to me