If you added or generated your XRP ledger account to XUMM and you want to deposit, no destination tag is required.
Your own XRP Ledger account managed with XUMM (r... address) doesn't need a destination tag when sending deposits. Sometimes (when withdrawing from an exchange) there is a box to check: eg. "No destination tag". In case of a sending platform that forces (requires) you to enter a destination tag, when sending to your own XRP Ledger account managed with XUMM, you can just enter any number you like.
For more info, see: