CT600 v Acounting periods

[Jo76]

Hi, can someone please untangle this for me :

1)First accounting priod per CH : 30.01.2024 - 31.01.2025 - ( request for submission extension to 31.01.2026 - accepted) - accounts Submitted 29.1.2026. OK
2) Accounts for HMRC for the period 30.01.2024-31.01.2025 - submitted to HMRC at the same time as Filig pages - on 29.1.2026
2 ) Tax comutation and CT600 for the period :30.01.2024-29.01.2025 submitted to HMRC on 29.1.2026 . There is a loss/ so no CT to pay.

During completion, the apportionment was made for Sales/Turnover by HMRC software, so I also apportioned the COS ( small amounts, really, but still ), hoping that when I finish with the 12 months for CT600, I will be asked to prepare the CT600 for the remaining 2 days. But no, there is no facility /or request from HMRC to complete CT600 for the 2-day period.
Per HMRC, the next return period is from 1.2.2025 to 31.07.2025.
Per Companies House, the next accounts for the period to 31.01.2026 is due by 31.10.2026
There is no consistency at all.
What is the best approach, please regarding them 2 days for CT600? Shall i contat HMRC and check why there is no facility to submit the CT 600 for 2 days ( 30 and 31 Jan 2025) ? I got lost, sorry...