You will be required to upload a .pdf document of last 6 (six) months of your bank statement. The six months should be from the date of your application; for e.g. if you are making the application on 11 November 2021 then you will need to upload the bank statement for the period 11 May 2021 to 10 November 2021. You are free to upload the bank statement for a higher period i.e. more than 6 months, if you wish but 6 months is bare minimum.