What calculation information do I need when reporting Capital Gains Tax via real-time report

One of the pages in the real-time report service for Capital Gains states: "Attach details of your calculation, You must upload a file that shows how you calculated your Capital Gains Tax. You can upload up to five PDF, JPG, or JPEG files. Each file can't be more than 4.5MB" However it doesn't provide the details of the calculation/information it requires. I was planning on providing: - Date of share acquisition/sale (these are the same date as they were option shares exercised when company was bought) - Net gain in £ (which is sale amount minus purchase amount - basically what went into my bank account) - My current annual income + the tax rate I pay (e.g. basic) - CGT allowance 2023/2024 (e.g. £6000) - Then show the calculation [CG tax owed £] = ([Net gain £] - [allowance £])*[10 or 20% depending on tax rate] Does this seem reasonable? Also are we required to provide evidence/screenshots for anything, e.g. the money being paid, our tax rate? Thanks in advance.

Hi
What you are doing is correct. You dont need to provide screen shots or anything at this time. you may be asked for further evidence at a later date though.

Thanks very much admin, much appreciated.