Hi there petranon,
It's vital that all your info is correctly entered so that your books can be well balanced. QuickBooks Online is a great tool able to help you give access to your books to your accountant so that they can make sure everything is in order. I can point you in the right direction for assistance with sharing documents.
One possible cause for missing buttons in QuickBooks Online would be browsing data. These temporary files can accumulate and affect your navigation in any cloud-based software like QuickBooks Online. Here are some steps to resolve issues caused by browsing data:
If the error still persists, I recommend reaching out to the QuickBooks Online support team outside of the Community. They'll be able to view the error with you in a secure setting in order to assist in getting the required attachments to your accountant or clients as well as notify our engineers if necessary. You can reach them using these methods:
Schedule a Callback or start a Chat: click (?)Help in the upper right > type and enter "Contact support" into the QB Assistant > click Contact Us > explain your situation > click Let's Talk > choose Get a callback or Start a Chat.
Social Media: Facebook and Twitter
If you have any other questions, feel free to reach out here.