function RegisterAction() {
        let saveSub = buyMore(0);
        let askbuyMore = prompt("Do you want to buy more? Y/N ");
        if(askbuyMore === "Y"||"y"||"Yes"||"yes"){
            saveSub = buyMore(saveSub);
            askbuyMore = prompt("Do you want to buy more? Y/N ");
        }else{
            return saveSub;
        }
        const caSalesTax = .0725;
        let caSalesTaxPercent = Math.round((caSalesTax*100)*100)/100;
        let registerTax = console.log(`California sales Tax is ${caSalesTaxPercent}%`);
        registerTax;
        let finalTotalRounded = Math.round(100*(saveSub*caSalesTax+saveSub))/100;
        let registerTotal = console.log(`Your final total with tax is $${finalTotalRounded}.`);
        registerTotal;
    }

Why is the if statement executing on first attempt when i aswer askbuyMore prompt with "n"?