What should be used when it asks for Account ? Im only using one bank account to track payments and incomes for GST and Bas ??

Hi userbundella2, 

If you are using QuickBooks Self Employed file, the prompt will show that a bank account should be linked up to track income, payments for BAS lodgements.

That being said where you seeing this message currently so I can check? Are you on a subscription plan other than QuickBooks Self Employed?

Hope to hear from you soon,

-Steven