How to change employer T4 form in QBO?

Hi p_yuriy, 

It's great to have you connect with us here in the Community. I can see the importance of being able to change the employer T4 in QuickBooks and I'll be glad to steer you in the right direction. 

In order to make changes to your T4, I recommend getting in touch with our phone support team so they can share your screen and assist with making the appropriate changes. You can get in touch with our support team using the contact details below: 

• Schedule a Callback or start a Chat: click (?)Help in the upper right in QuickBooks Online > 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, Twitter, and Instagram.
• Support hours are from Monday to Friday between 9 a.m. and 8 p.m. ET.

Feel free to keep me posted on how you make out. I'll be one message away in case you need anything else.