Now I am trying to verify it on etherscan but first when I try to just copy past overthrew it does not find the link where ERC20 source code are and then when I send all file separately with ERC20 on open zeppelin + IERC20 + Context + IERC20Metadata it send me back this message : Error! Unable to generate Contract ByteCode and ABI
Glad to hear that, but for the next time, please search your question on the forum before asking, if you found a similar question, you can follow the suggestion of that question, if it still not works, then open a new topic to ask for help.