Text to Give transactions always process to the default payment method for your account. If you have multiple saved payment methods in your profile, you can easily change which one your Text to Give transactions will process toward. To do that,
1. Log into your account at https://app.securegive.com.
2. Go to My Account > My Payment Methods.
3. Click on the Default Payment dropdown that is located at the top right. From the dropdown choose the payment method that you want your Text to Give donations to process toward.