Once you have all of your accounting information exported from your legacy system as described in this Community Post, you can begin importing your AR Aging Details into Striven. There is a Generate Sample File option that will enable you to create the proper format for your import file.
It is recommended that you begin with your Open Invoices and Credit Memos, and then verify your AR Account to ensure that the transaction data is correct.
For more information regarding the import file configuration and requirements for Invoices and Credit Memos, please visit the Performing an Opening Balance Migration section of our Accounting Migration Guide. You may also want to browse our Striven Business Software YouTube channel for other useful Accounting related topics.