See in Kolkata there are a lot of hotels but each of them have there own issues. Some may ask you for double vaccination certificate (for >18 years) or RT-PCR test negative report. Although this are not applicable for all but for the good ones.

Now if you want to stay in hotel near howrah then it can be tough but you can take any Oyo room service or any online booking platforms in order to occupy a place for you. This will be more beneficial for you rather than to contact the hotel authorities.

I hope this helps. All the very best for your future endeavors!