If you added or generated your XRP ledger account to XUMM and you want to deposit, no destination tag is required.
Your own XUMM account (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 XUMM account, you can just enter any number you like.
For more info, see: