Solution:Having problem in submitting tax information in Adsense?

From past few days i am having a problem in submitting tax information in adsense.
When i click on submit tax information button the page just refreshes.
My friend also has a account on adsense.I said him to login into his account
He has already submitted the tax information.I clicked on tax information
on his account then i clicked on change tax information and there it is i found out the solution,i copied that URL and then login to my account paste that url and it worked.

So what to do

Just login into your adsense account

paste https://www.google.com/adsense/change-account-tax

on url bar

press ENTER

Now you can see tax information page

This Problem finally solved by google today
what is the problem see here