Can I share the form for review after the return has been transmitted/accepted?

Yes, you can still share the form for review even after the return has been transmitted/accepted. 

However, please note that sharing your return before transmitting it to the IRS will allow you to make changes to your return if required. If you want to make changes to the return after the transmission, you need to file an amended return.

To avoid this, ensure that you have shared your return with the reviewer/approver before you transmit it to the IRS.