I create a bsc token and I have some doubts

I have deployed a contract (safemoon code), and I´m doing some tests. The problem is that I´ve put a 8 % liquidity tax, but when I sell the tokens the liquidity doesnt rise. This is the contract:

https://poocoin.app/tokens/0xf0b244a3b3dd1ceb677b4aa347e01daeba7689d1