The answer to your question highly depends on your individual circumstances, for instance, which of the many sections you had to fill in from the application form.
The best you can do is refer to the official guidelines that explain, section by section, what documents -and how many- are appropriate for your case. Find them here:
https://assets.publishing.service.gov.u ... tes-v3.pdf
As you are the only one who knows which sections you had to fill, take a look at the guidelines and according to your relevant sections, decide.
My posts express what I believe are the facts, based on the best of my knowledge, about the topics discussed in this forum. They do not constitute immigration advice.