To expand on your issue going forward, make sure you understand how the partnership (PE) handles nonresident members when it generates income.
For tax years beginning on or after 1/1/2019, the PE may file a composite return on behalf of the nonresident partners / members. If that is done, the nonresident tax is remitted to CT by the partnership. You (as a nonresident of CT) will not have any further filing requirement for CT; unless you have other CT activity.
*A reminder that posts in a forum such as this do not constitute tax advice.
Also keep in mind the date of replies, as tax law changes.
