Currently, there is not an option (that I am aware of, at least) to import the AR GL Account when importing a batch of invoices. I currently have to go into each invoice header and change the AR GL Account since the default is not the one used for the bills I generate.
@Guest See our knowledge base article for more info on AR importing. With the CSV import there is a dedicated column (G) for the GL Account info.
https://adginc.zendesk.com/hc/en-us/articles/36913474472845-FMS-File-Import-Export-Specifications
What type of AR import are you running? Please reach out to us and we can either guide you on how to use a format that supports what you need, or provide options to enhance the interface you're currently using.