The taxpayer shall at any time have the right, by a signed notice in writing filed with the collector, to waive the restrictions and delays prescribed in R.S. 47:1562 through 47:1565 which must ordinarily be observed before an assessment may become final. When such a waiver is executed, the assessment is final when made and is immediately collectible by distraint and sale.
La. Revenue and Taxation § 47:1565.1