Update bank accounts
Currently you can update any account from your chart of accounts except bank accounts.
This suggestion is to add update (POST) support for accounts with Type of BANK on the Accounts endpoint.
Note It is possible to create bank accounts, this is specifically in regard to updates.

We have released an update that allows bank accoutns to be updated via the API please see docs below
https://developer.xero.com/documentation/api/accounting/accounts
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Malcolm commented
all people have to do is download their bank into .csv, -and then import into your software. your instructions for doing this are too vague, but that's all
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Malcolm commented
when setting up bank account xero should allow sort/acct codes to be blank. not all bank acocutns are real