Hello my printer mp470 keep saying error paper output slot the paper is jammed clear the paper nad press ok i did all that and its still saying the same message do you have a phone number that i can call

After reading ajkill's solution I was initially annoyed to discover that the "form feed" bottom does not exist on my MP470, in fact I couldn't find any sort of feed button at all. But reading on I decided to try his suggesting of trying to force feed an envelope through (i used one of those 4x6 vanilla envelopes) It wouldn't go through at all. When I went to pull it out to try to feed it through the reverse way out popped this button that was stuck in there causing the jam. Don't ask me how a button ended up in there all I know is my printer works again.

Please follow the instruction given below ...
1. Turn the printer off and open the access cover.
2. Look for any obstructions in the paper path and remove them if necessary. (It is possible to move the carrier assembly with the power off.)
3. Turn the printer on, load some paper, and press the Form Feed button.
4. Watch the paper as it feeds through and try to determine where the jam is occurring.
5. Check to see if all the rollers are turning.

If all the rollers are turning, there may be something in the feed path that you can't see. Go to step 6.
If not, there is probably a feed motor or a gear problem and the printer may require service.
6. If the paper is jamming under the carrier assembly, you may be able to fix it using the manual feed slot.
7. Turn the printer off.
8. Take a #10 envelope and feed it through the left side of the manual feed slot until it comes right through the printer to the back of the exit rollers.
9. Move it up and down first, and then slowly move it over to the right side. If something is stuck under the black guide plate, this may work it loose.