I'm at the last page and it says to 5 digit signature code, i did that. everything is correct. says to complete action below but i don't see any action to do.

[LisaBr]

After entering your five digit code, there is a box to read some random numbers/letters located about mid-way on the page.  This is a security measure to "prove you aren't a robot". 

Sometimes it may be difficult to read these numbers/letters, however it's ok to take several attempts.  New codes will be generated that might be easier to read.

After that you will see a button on the far right that reads, Transmit Return.  Once you click this button, your return is sent.