*See attached sample excel with cashflow boost

Cashflow Boost is under a "Government Industry Receipts" and  its tax free,  classify this as Grants


Tax form view

From below tax return sample, it shows that "Cashflow Boost" is being reconciled as a deduction for Non assessable income (Less: Income Reconciliation Adjustment).


In this case, just add it back again  as negative

 

Reference:

ATO : Tax treatment of JobKeeper Payments