You may import accrual-based accounts and convert them to cash basis.

In the reconciliation section -

Adjust in prior year accounts receivable &/or payable.

Adjust out current year accounts receivable &/or payable.

Finally, is is important that you recognise the GST associated with your accounts receivable & payable values since the GST component should not be part of the reconciling adjustment.

Simply click YES. To expose the section to report the GST component.

Related Article:

Cash vs Accrual Reporting in Tax Forms

GST Reconciliation - Cash GST reporting and Accrual accounting