Got app approved and "pending contract", but no buttons appear in Bank, Tax information
Ok, this is ridiculous, but I accidentally found the solution: when clicking the "Request" button in the Taxes/Contracts module a form popped up displaying my address data. No agreement, contract texts, however. 
Then I clicked "Save" to confirm this address data. Nothing happened, the form stayed. 
Then I clicked "Save" again. 
And again. 
And again. 
And again. 
After the 5th time of clicking "Save" in a row - suddenly the agreement and contract window appeared!!! 

Apple, you must be kidding! Really! I can reproduce this weird mechanic anytime. For anyone stumbling onto the same problem - make sure you DON'T click on "Cancel", or you will never see the requested agreement.