Hi, welcome! 
Sorry, I am not familiar with the BSC-Chain, maybe you should ask for help in their forum: Home | Binance Chain Forum
And they have a documentation about how to verify contracts, maybe you can have a look at it:
If you deployed your contract with Remix, maybe you can have a look at this tutorial: Verify erc20 token on etherscan that was deployed through remix:step by step guide
And for the next time, please search at the forum at first, and then ask questions, thanks!
How do I ask a good question? - General / Meta - OpenZeppelin Community
I prefer to close this topic, if you still can not verify your contracts following all the tutorials I shared above, you can reply under this topic and ping me.