The user may be restricted for that feature reason why writing check is missing on his end as well as the previous checks or accounts. To start, you can review the user's access by following these steps:
- Click on Users from the Company menu.
- Tap on Set up Users and Roles.
- Enter the admin password.
- Go to the User List.
- Review the user's access or roles assigned from there.
If he is restricted, allow him to manage checks and accounts on your QuickBooks Desktop.
For additional reference about users and restrictions, check out this article.
On the other, visit this link for additional reference about reconciliation in QuickBooks Desktop.
Post again if you have any other questions. I'm a few clicks away to help. Have a good day!