Your question is not clear.
If you are asking about making a new Tier 4 application having previously studied in the UK, then the procedure is largely the same now as it was when you applied before. See
https://www.ukcisa.org.uk/Information-- ... ide-the-UK
If you already know that you cannot apply because you have reached the relevant 2-, 5-, 6- or 8-year limit, then there is no system for negotiating with the Home Office for addtional time. Any discussion needs to be with your Tier 4 sponsor themselves, who have the option to sponsor a student who is over the limit but only if they are satisfied that there are
...exceptional compelling and compassionate circumstances that either prevented the student from completing the course within the time given or caused them to leave their course prematurely (for example, serious illness or disability).
See the Tier 4 Sponsor Guidance, document 2, paragraph 5.64.
https://www.gov.uk/government/publicati ... -educators
I do not give immigration advice. I refer you to Immigration Rules, guidance, other online content and to your sponsor.