Images printed on light colored transfer paper must be printed in reverse. This allows the image to be pressed right side up and able to be read normally. This print requirements varies from product to product. You must verify the printing requirements on the transfer sheet package.
Working from the master image
Group all layers into one.
Use Layers -> Merge Visible (This merges
all visible layers at once.)
Next Use Select -> Select all (or <ctrl +A>)
Next use Edit -> Transform -> Flip Horizontal
Verify that all objects flipped or reversed. If
the text did not, reverse itself verify that the
text layer rasterized. There should not be
any square boxes on the layer icon.
Save the file as a separate image with the JPG or
JPEG file time.
Use File-> Save As FileType: JPEG or JPG