Either the accountant, or set up a savings account with an auto transfer monthly. That provides the funds and as soon as the tax bill is received, transfer funds, pay the bill. It isn't much easier than that. But why would the bank want to provide such a service, and for just one account? I might help my customer find a solution, but I wouldn't be that solution.
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AndyZ CRCM
My opinions are not necessarily my employers.
R+R-R=R+R
Rules and Regs minus Relationships equals Resentment and Rebellion. John Maxwell