Chapter 3.40 TAXES IN GENERAL – CONFIDENTIALITY OF TAXPAYER INFORMATION This chapter is included in your selections. Sections: 3.40.010 Provisions applicable to all taxes. 3.40.020 Sharing of confidential taxpayer information. 3.40.030 RCW 82.32.330 incorporated by reference. 3.40.040 Amendments, modifications and repeals of RCW 82.32.330 incorporated. 3.40.050 Guarantee of confidentiality.