Splitting coins can be tricky. The easiest way to split BCH to get your BCHA is to use an exchange, as this tutorial explains. Alternatively, you can use this website, but remember that the splitting process may not always go as planned so you should always test with smaller amounts first.
+Before sending BCHA or BCH from your wallet, it is important to split your pre-fork coins so that your transactions are not replayed (for example also sending BCH when you only meant to send BCHA to someone). There a several ways this can be done.
+A good way to split BCH and BCHA from each other is to use Electrum ABC and Electron Cash, as described here.
+Some other methods are to use an exchange, as this tutorial explains, or alternatively you can use this website. But remember that the splitting process may not always go as planned so it is wise to test with smaller amounts first, or use a method where you only send coins to yourself (as with the Electrum ABC - Electron Cash method above).