When receiving to your Infinity Wallet you do not need a "Destination tag" or "Memo ID". If you are sending to your Infinity Wallet from a platform that requires you to place one of these when sending, then you can enter any that you like.
When sending from your Infinity Wallet however, you should make sure to check if the recipient requires a "Destination tag" or "Memo ID" to be supplied. This is typically the case when sending to an exchange or centralized service/wallet to identify your deposit.
Failing to provide a "Destination tag" or "Memo ID" when it is required by the recipient can result in them being unable to assign your assets.