How to add liquidity fee to my bep20 token source code

Please help me to sell my first token, if I creat a bnp/my token liquidity pool on pnkswap after I creat a token, when I can add thats address to my source code. i dont know how can I write a code to add %liqidity fee from every transaction to liquidity pool on pnkswap.
best regards

:1234: Code to reproduce

:computer: Environment

This is a smart contract development forum. Your question is off topic.