Can we set up an automatic reminder email when an invoice becomes overdue and for reminders to be sent every week until it is paid?

Afaik, Invoice reminder feature is only available in QBO Advanced. Another option, consider using a 3rd party AR app to get the feature.

Hello Kate20

Currently there is not a way to automate the reminders. it would be a case of clicking on overdue on the banner and then either using the batch actions or ticking the ones you want to send and then clicking on send reminders from the batch actions drop down. At present there is not a way to automate this but we do recommend leaving feedback by clicking on the cog on the top right>feedback.

Emma