If you elected to have the funds auto-debited from your account and indicated that on your tax returns, it depends on with the IRS and/or your state actually process those funds. So it can take anywhere from the date you elected, up to 3 weeks after for the funds to come out depending on how fast the IRs and/or your state process and approve your return.
If you are paying online, the funds will be deducted immediately.
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