set tax to 0

src/components/SideCart/SideCart.jsx

                 <Typography variant="body1" sx={{ fontWeight: "400" }}>Taxes</Typography>
                 <Typography variant="body1" sx={{ fontWeight: "400" }}>
                   {`
-                    ${cart?.cost?.totalTaxAmount?.currencyCode} 
-                    ${parseFloat(cart?.cost?.totalTaxAmount?.amount).toFixed(2)}
+                    ${cart?.cost?.totalTaxAmount?.currencyCode || ""} 
+                    ${parseFloat(cart?.cost?.totalTaxAmount?.amount || 0).toFixed(2)}
                   `}
                 </Typography>
               </Box>

src/pages/Cart.jsx

               <Typography variant="body1" sx={{ fontWeight: "400" }}>Taxes</Typography>
               <Typography variant="body1" sx={{ fontWeight: "400" }}>
                 {`
-                  ${cart?.cost?.totalTaxAmount?.currencyCode} 
-                  ${parseFloat(cart?.cost?.totalTaxAmount?.amount).toFixed(2)}
+                  ${cart?.cost?.totalTaxAmount?.currencyCode || ""} 
+                  ${parseFloat(cart?.cost?.totalTaxAmount?.amount || 0).toFixed(2)}
                 `}
               </Typography>
             </Box>