Question

英语翻译我们系统不允许有2个银行账号,所以你只要给我1个银行账号就可以了

Answer 1

直译：

Our system doesn't accept two bank accounts, so you only need to provide me one.

或者,下面的更地道些：

Our system doesn't accept two bank accounts, so you only need to provide me with either one.