Washington Revised Code Title 11. Probate and Trust Law § 11.130.190. Petition for appointment of guardian for minor (Effective January 1, 2021, or January 1, 2022;  see RCW 11.130.915)

(a) The minor's name, age, principal residence, current street address, if different, and, if different, address of the dwelling in which it is proposed the minor will reside if the appointment is made;

(b) The name and current street address of the minor's parents;

(c) The name and address, if known, of each person that had primary care or custody of the minor for at least sixty days during the two years immediately before the filing of the petition or for at least seven hundred thirty days during the five years immediately before the filing of the petition;

(d) The name and address of any attorney for the minor and any attorney for each parent of the minor;

(e) The legal basis for the guardianship.  Factual reasons why the guardianship is sought and would be in the best interest of the minor shall be set out in a separate supplemental declaration;

(f) The name and address of any proposed guardian and the reason the proposed guardian should be selected;

(g) If the minor has property other than personal effects, a general statement of the minor's property with an estimate of its value;

(h) Whether the minor needs an interpreter, translator, or other form of support to communicate effectively with the court or understand court proceedings;

(i) Whether any parent of the minor needs an interpreter, translator, or other form of support to communicate effectively with the court or understand court proceedings;  and

(j) Whether any other proceeding concerning the care or custody of the minor is pending in any court in this state or another jurisdiction.