HB1572 – Exempts rental car company purchases of EVs and hybrids from sales and use taxes; applies the current tax on car rentals to peer-to-peer car sharing.
Prime Sponsor – Representative Fitzgibbon (D; 34th District; West Seattle)
Current status – Referred to the Committee on Finance.
Next step would be – Scheduling a hearing.
Legislative tracking page for the bill.

Summary –
The bill would exempt a rental car company’s purchases of electric and hybrid vehicles to be used exclusively as rentals from the sales and use taxes. It would apply the current 5.9% tax on car rentals to peer-to-peer car sharing transactions, unless rental car companies were authorized to use reseller permits to buy vehicles for use as rental cars, or were exempted from paying “sales or use tax or or any other tax generally applicable to a transaction involving the acquisition of any motor vehicle.” [That seems to mean that this new tax would not apply if the bill passed, since the bill does seem to exempt them from sales and use taxes, so I don’t see what this provision is intended to do.]