	Three Months Ended
	March 31,
	2021			2020
	(In Thousands)
Current:
Federal	$	—		$	—
State		(285	)		35
Total Current	$	(285	)	$	35

Deferred:
Federal	$	(80	)	$	(753	)
State		407			379
Total Deferred	$	327		$	(374	)
Provision (benefit) for income taxes	$	42		$	(339	)

For the three months ended March 31, 2021 and 2020, the current provision (benefit) for state income taxes shown above includes regular state income tax, provisions for uncertain state income tax positions, the impact of state tax law changes and other similar adjustments.

Our estimated annual effective tax rate for 2021 includes the impact of permanent tax differences including but not limited to limits on deductible compensation, and valuation allowances.

We considered both positive and negative evidence in our determination of the need for valuation allowances for deferred tax assets. Information evaluated includes our financial position and results of operations for the current and preceding years, the availability of deferred tax liabilities and tax carrybacks, as well as an evaluation of currently available information about future years. Valuation allowances are reflective of our quarterly analysis of the four sources of taxable income, including the calculation of the reversal of existing tax assets and liabilities, the impact of financing activities and our quarterly results. Based on our analysis, we currently believe that it is more-likely-than-not that a portion of our federal deferred tax assets will not be able to be utilized and we estimate the valuation allowance to be recorded during 2021 to be approximately $3.0 million. We have also determined it is more-likely-than-not that a portion of our state deferred tax assets will not be able to be utilized. However, we estimate a reduction in the related valuation allowance associated with these state deferred tax assets to be recorded during 2021 will be approximately $0.5 million.

We will continue to evaluate both the positive and negative evidence on a quarterly basis in determining the need for a valuation allowance with respect to our deferred tax assets. Changes in positive and negative evidence, including differences between estimated and actual results, could result in changes in the valuation of our deferred tax assets that could have a material impact on our consolidated financial statements. Changes in existing tax laws could also affect actual tax results and the realization of deferred tax assets over time.

The tax provision for the three months ended March 31, 2021 was minimal and the tax benefit for the three months ended March 31, 2020 was $0.3 million (2% benefit on pre-tax loss). For both periods, the effective tax rate is less than the statutory tax rate primarily due to the impact of the valuation allowances.

LSB and certain of its subsidiaries file income tax returns in the U.S. federal jurisdiction and various state jurisdictions. With few exceptions, the 2017-2020 years remain open for all purposes of examination by the U.S. Internal Revenue Service and other major tax jurisdictions. Additionally, the 2013-2016 years remain subject to examination for determining the amount of net operating loss and other carryforwards.