Open your Trezor
Switch to DASH
Click Add account
Click the Receive tab
For the address labelled /0 click "Show full address" (also click to confirm on the Trezor)
Register this DASH address with CrowdNode
Transfer DASH to the new address - either from another Trezor account or from any other wallet
Send to CrowdNode :-)
To ensure that you always deposit from the Dash address registered with CrowdNode in the future, it is important that you stick to only using the first address (index /0) whenever you move DASH to your newly created Trezor account before you move deposit them at CrowdNode.