mulitple tabs with info linked to a single contents page

[toolboxx]

Hi friends, am trying to create a xls sheet with multiple tabs. that will contain a standardised invoice template, these tabs will be numbered 1,2,3 and so on

however i would also like to have a centralised contents page in tab number 0 which is then updated (linked) from the fields within each tab so i can see on a row centralised details from who tab 1 relates to. eg tab 1 is invoice sent to xyz and x amount etc, tab 2 is invoice sent to ABC

i am ok with xls but i dont even know what this function is called to start..

many thanks in advance! tb