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INCOME AND SOCIAL CONTRIBUTION TAXES - Rollforward (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Rollforward of net balance of deferred income tax |  |
Beginning balance | R$ (1,029,135) | R$ (1,787,354)
Business combination with Fibria | 1,034,842 |
Tax loss | 270,559 | (264,955)
Tax loss carryforwards | 139,719 | (23,203)
(Reversal)/provision for judicial liabilities | 31,262 | (1,964)
Operating provisions and other losses | (21,757) | 82,785
Exchange rate variation - Taxation on a cash basis | 552,421 | 451,300
Derivative losses | 319,860 | 390,198
Fair value adjustment on business combination - Amortization | 699,527 | 5,327
Unrealized profit on inventories | 65,492 | 124,454
Lease | (3,274) | 69
Adjustment to present value |  | 174
Tax benefit on unamortized goodwill | (203,696) | (3,098)
Property, plant and equipment - Deemed cost | 46,359 | 51,408
Accelerated depreciation | 82,982 | (13,067)
Borrowing cost | 44,727 | (23,145)
Fair value of biological assets | (60,778) | (22,307)
Tax provision on results of subsidiaries abroad | (351,485) |
Tax credits - gains in tax lawsuit (ICMS from the PIS/COFINS calculation basis) | (43,559) |
Other temporary differences | (18,901) | 4,243
Ending balance | R$ 1,555,165 | R$ (1,029,135)

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- Definition The increase (decrease) in deferred tax liability (asset) resulting from the net exchange differences arising when the financial statements are translated from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Deferred tax liability (asset)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 81 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81&doctype=Standard -URIDate 2019-03-27 + Details
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