TxHash stands for transaction hash, and is also known as a transaction ID.
An example of what a TxHash looks like: 0xXXXXXXXX83956b9c900f5d6f6a54fd3367020aa478f2974a05exxxxxxxxxxxxx
To check a TxHash, follow the steps below:
On Etherscan.io, go to the search bar at the top right hand corner of the website. Paste your transaction hash (TxHash) in the search bar and click GO