[FIX] account: if tax is , total base is
applied only on the main tax and does not carry the child tax amount into base, it is compulsory to add child tax amount to tax base
becuase the next tax i.e. VAT is applied on total tax base amount
[MERGE] [FIX] account: when computing a tax with include_base_amount enabled, include the child tax amounts into the sum for the next tax