P85 once you have left the UK

I have filled in the "online" P85 form which took a fair bit of time, at the end it didnt allow for an online submission but that I had to print it and post it. Since I have left the UK this would be costly. Is there perhaps a link to a real online submission of the P85 and P45? thank you

Hi
If you intend to leave the UK but have not yet left, you must print and post your P85. 
You can tell HMRC that you’ve left the UK and want to claim back tax from your UK employment here: 
Get your Income Tax right if you're leaving the UK (P85)