As per the new guidelines from Centeral government now you don't need any kind of permission to visit any state in India, but states have every right to put you in quarantine as per their policy.
For UTTARAKHAND please log into dsclservices.org.in .
All the information and new SOP's are updated in smart City website as well as registration for inbound travellers. Rest information you can get from the site.
Hope this helps.
Travel guidelines have been changed and have been relaxed slightly in order to uplift the tourism industry.. Issuance of e-pass has been made easy. Tourists will get it without much hassle and wait now. Your Negative covid report will be valid till 96 hrs now instead of 72 hrs. As far as my knowledge goes, you will have to cross 3 checkposts in order to cross the himachal border.