The only CT entity form that is viewable is the extension form.  As a test, I tried to e-file the form CT-1065/CT-1120SI EXT for our own partnership and had this message along with a transmission error:

Failed transmission on February 13, 2025
Validation Failure: Error 54: Tax Year 2024 transmissions are not available.

Resolution: Lacerte is not ready to process Tax Year 2024 for this filing

So, at this juncture, filing the federal entity returns and extending CT (can easily calculate any balance due) is not possible through Lacerte.  Of course, we can paper file these returns but CT will not accept payment by manual check.  We can pay that on-line but need to further coordinate with each business client.

This is an unwelcomed mess and time sink.