You cannot send XRP funds to the same address from which you are sending the funds, even if using a different tag. XRP transactions are uniquely identified by their destination address and destination tag. Each transaction must have a unique combination of destination address and destination tag to ensure proper identification and processing.
The destination tag allows the recipient to identify the purpose or recipient account associated with the transaction. The destination tag also helps exchanges and other platforms identify incoming transactions and associate them to the correct user account. Therefore, if you attempt to send XRP to and from the same address but with a different tag, the transaction would be considered invalid. The network would likely reject the transaction or would treat it as a duplicate and not process it.
When sending XRP, you need to specify both the destination address and destination tag. To send XRP with a different tag, you must send it to a different address, even if it belongs to the same user or entity.