Calculation

The amount to be entered in box [00550] "Taxable base before application of the capitalization reserve and offsetting of negative tax bases" is obtained after applying the total of the corresponding corrections (boxes [00417] and [00418]) to the result of the profit and loss account (box [00501]):

[00550] = [00501] + ([00417] - [00418])

The result of this operation must be entered in box [00550] in all cases, even when it is equal to zero or negative. And, in this last case, preceded by the minus sign (-).

The first transitional provision of the LIS establishes that the positive and negative extra-accounting adjustments made to determine the taxable bases of the Corporate Tax corresponding to tax periods initiated prior to the entry into force of Law 27/2014, will be taken into consideration for the purposes of determining the taxable bases corresponding to the tax periods in which said Law is applicable, in accordance with the provisions of the regulations that regulated them.

In no case will it be admissible that the same income is not taken into consideration or is taken into account twice for the purposes of determining the taxable base for Corporate Tax.