Welcome to the community @btc58
Congratulations on deploying an ERC20 token to mainnet.
The tests are a good place to start for contracts where there isn’t a guide yet.
https://github.com/OpenZeppelin/openzeppelin-solidity/blob/master/test/token/ERC20/TokenTimelock.test.js
Do you use Truffle?
Have a look at this similar question in the forum:
If you need step by step instructions for Remix I can try to put something together early next week.