You can have your birth certificate corrected. https://www.doh.wa.gov/LicensesPermitsandCertificates/BirthDeathMarriageandDivorce (Texas probably...

RCW 26.04.130 describes voidable marriages. Adultery is not relevant. You can obtain a dissolution of your marriage.

Can we schedule court appointed child visits for my husband even though we are still married?

Legal separation contracts can include provisions for parenting plans. http://app.leg.wa.gov/RCW/default.aspx?cite=26.09.070

Regarding bringing a child from Guatemala to UK

You would have to ask an attorney in Guatemala about the law there.

Is it possible for me to apply for US green card while I am holding a Canadian PR card?

There probably isn't any problem with that. https://www.uscis.gov/greencard/eligibility-categories

WA state: Snohomish Co: Will I be able to get q-tip drug testing ordered if I file contempt for drug use?

Courts have great discretion in issuing orders. The primary consideration is what's in the best interests of the child.

WA state: Snohomish Co: Can my car be taken as an asset in a judgment?

RCW 6.15.010 includes, among other items of personal property which are exempt from collection actions, "For an individual, a motor vehicle used...

What does a judge use to decide if there was joint decision making

If the terms of your child support order or parenting plan are unclear, you can make a motion to the court for clarification. Sometimes there are...

WA CPS Seattle newborn drug test protocol for methadone baby

Communicate with your social worker: https://www.dshs.wa.gov/ca/parent-resources/working-social-worker

Is it illegal for a client to receive an increased settlement for medical services provided for an mva and not pay the provider?

The amount your patient owes you for your professional health care is a different question from the amount the third party/insurance company owes...