I have an invoice with 1 line, and two taxes. I need the price to change according to the selected tax.
example:

price:500, Quantity:1

tax1: (price * 0.084)* %tax1

tax2: (price * 1) * %Tax2

Being a single line, the price is the same for both taxes. 
The error is that it always takes the same price for the calculation of the two taxes. despite the filter. (if xx.code [10])

code:

    @api.multi

    def get_taxes_values(self):#para calcular el valor de los impuestos.

        tax_grouped = {}

        for line in self.invoice_line_ids:

            if len(line.invoice_line_tax_ids)==2:

                for line_tax in line.invoice_line_tax_ids:

                    taxes={}

                    taxesisc={}

                    if line_tax.tipo_afectacion_igv.code in ["10"]:                 

                        price_unit = line.price_unit * (1 - (line.discount or 0.0) / 100.0)-line.descuento_unitario

                        taxes=line.invoice_line_tax_ids.compute_all(price_unit, self.currency_id, line.quantity, line.product_id, self.partner_id)['taxes']   

                        for tax in taxes:

                            if line_tax.tipo_afectacion_igv.code in ["10"]: 

                                val = self._prepare_tax_line_vals(line, tax)

                                key = self.env['account.tax'].browse(tax['id']).get_grouping_key(val)                               

                                if key not in tax_grouped:

                                    tax_grouped[key] = val

                                else:
                                    tax_grouped[key]['amount'] = val['amount']

                                    tax_grouped[key]['base'] = val['base']
                               
                    elif line_tax.tipo_afectacion_igv.code in ["99"]:   

                        price_unitisc = line.price_unit*0.847 * (1 - (line.discount or 0.0) / 100.0)-line.descuento_unitario

                        taxesisc=line.invoice_line_tax_ids.compute_all(price_unitisc, self.currency_id, line.quantity, line.product_id, self.partner_id)['taxes']     

                        for taxisc in taxesisc:

                            if line_tax.tipo_afectacion_igv.code in ["99"]: 

                                val1 = self._prepare_tax_line_vals(line, taxisc)

                                key = self.env['account.tax'].browse(taxisc['id']).get_grouping_key(val1)

                              
                                if key not in tax_grouped:

                                    tax_grouped[key] = val1

                                else:

                                    tax_grouped[key]['amount'] = val1['amount']

                                    tax_grouped[key]['base'] = val1['base']
                 
        return tax_grouped